[+] 3dimensional pointsCalculates distance between two 3dimensional points (x_{1}, y_{1}, z_{1}) and (x_{2}, y_{2}, z_{2}) as well as the parametric equations and symmetric equations
Features: Calculator  Quiz Generator  Practice Problem Generator  Watch the Video
Examples (4): (1,2,3)(4,5,6), distance between (2,4,6)(3,5,7), (1,2,3)and(4,6,8), distance between (3,4,5),(5,6,7)Tags: distance, parametric equations, point, symmetric equations

[+] Angle Ratio for a Triangle 
[+] Annulus 
[+] Bretschneiders Formula 
[+] Cevian Triangle RelationsGiven a triangle with a cevian, this will solve for the cevian or segments or sides based on inputs
Features: CalculatorTags: cevian, segment, side

[+] Chord 
[+] CirclesCalculates and solves for Radius, Diameter, Circumference, and Area of a Circle.
Features: Calculator  Quiz Generator  Practice Problem Generator  Watch the Video
Examples (76): Circle radius = 2, Circle diameter = 2, Circle area = 2, Circle circumference = 2, Circle radius = 3, Circle diameter = 3, Circle area = 3, Circle circumference = 3, Circle radius = 4, Circle diameter = 4, Circle area = 4, Circle circumference = 4, Circle radius = 5, Circle diameter = 5, Circle area = 5, Circle circumference = 5, Circle radius = 6, Circle diameter = 6, Circle area = 6, Circle circumference = 6, Circle radius = 7, Circle diameter = 7, Circle area = 7, Circle circumference = 7, Circle radius = 8, Circle diameter = 8, Circle area = 8, Circle circumference = 8, Circle radius = 9, Circle diameter = 9, Circle area = 9, Circle circumference = 9, Circle radius = 10, Circle diameter = 10, Circle area = 10, Circle circumference = 10, Circle radius = 11, Circle diameter = 11, Circle area = 11, Circle circumference = 11, Circle radius = 12, Circle diameter = 12, Circle area = 12, Circle circumference = 12, Circle radius = 13, Circle diameter = 13, Circle area = 13, Circle circumference = 13, Circle radius = 14, Circle diameter = 14, Circle area = 14, Circle circumference = 14, Circle radius = 15, Circle diameter = 15, Circle area = 15, Circle circumference = 15, Circle radius = 16, Circle diameter = 16, Circle area = 16, Circle circumference = 16, Circle radius = 17, Circle diameter = 17, Circle area = 17, Circle circumference = 17, Circle radius = 18, Circle diameter = 18, Circle area = 18, Circle circumference = 18, Circle radius = 19, Circle diameter = 19, Circle area = 19, Circle circumference = 19, Circle radius = 20, Circle diameter = 20, Circle area = 20, Circle circumference = 20Tags: area, circle, circumference, diameter, radius

[+] Clock Angle 
[+] Clock Hands Meet 
[+] Cones 
[+] Cost Function 
[+] CubeSolves for Volume (Capacity), Lateral Area,Surface Area, and the value of a side for a cube.
Features: Calculator  Quiz Generator  Practice Problem Generator  Watch the Video
Examples (76): Cube volume = 2, Cube surface area = 2, Cube side = 2, Cube lateral area = 2, Cube volume = 3, Cube surface area = 3, Cube side = 3, Cube lateral area = 3, Cube volume = 4, Cube surface area = 4, Cube side = 4, Cube lateral area = 4, Cube volume = 5, Cube surface area = 5, Cube side = 5, Cube lateral area = 5, Cube volume = 6, Cube surface area = 6, Cube side = 6, Cube lateral area = 6, Cube volume = 7, Cube surface area = 7, Cube side = 7, Cube lateral area = 7, Cube volume = 8, Cube surface area = 8, Cube side = 8, Cube lateral area = 8, Cube volume = 9, Cube surface area = 9, Cube side = 9, Cube lateral area = 9, Cube volume = 10, Cube surface area = 10, Cube side = 10, Cube lateral area = 10, Cube volume = 11, Cube surface area = 11, Cube side = 11, Cube lateral area = 11, Cube volume = 12, Cube surface area = 12, Cube side = 12, Cube lateral area = 12, Cube volume = 13, Cube surface area = 13, Cube side = 13, Cube lateral area = 13, Cube volume = 14, Cube surface area = 14, Cube side = 14, Cube lateral area = 14, Cube volume = 15, Cube surface area = 15, Cube side = 15, Cube lateral area = 15, Cube volume = 16, Cube surface area = 16, Cube side = 16, Cube lateral area = 16, Cube volume = 17, Cube surface area = 17, Cube side = 17, Cube lateral area = 17, Cube volume = 18, Cube surface area = 18, Cube side = 18, Cube lateral area = 18, Cube volume = 19, Cube surface area = 19, Cube side = 19, Cube lateral area = 19, Cube volume = 20, Cube surface area = 20, Cube side = 20, Cube lateral area = 20Tags: capacity, cube, lateral area, surface area, volume

[+] Cuboid 
[+] CylindersCalculates and solves for Radius, Diameter, Volume (Capacity), Lateral Area, and Surface Area of a Cylinder.
Features: Calculator  Quiz Generator  Practice Problem GeneratorTags: capacity, cylinder, diameter, lateral area, radius, surface area, volume

[+] DecagonSolves for the side, perimeter, and area of a decagon.
Features: Calculator  Quiz Generator  Practice Problem Generator
Examples (60): Decagon side = 1, Decagon area = 1, Decagon perimeter = 1, Decagon side = 2, Decagon area = 2, Decagon perimeter = 2, Decagon side = 3, Decagon area = 3, Decagon perimeter = 3, Decagon side = 4, Decagon area = 4, Decagon perimeter = 4, Decagon side = 5, Decagon area = 5, Decagon perimeter = 5, Decagon side = 6, Decagon area = 6, Decagon perimeter = 6, Decagon side = 7, Decagon area = 7, Decagon perimeter = 7, Decagon side = 8, Decagon area = 8, Decagon perimeter = 8, Decagon side = 9, Decagon area = 9, Decagon perimeter = 9, Decagon side = 10, Decagon area = 10, Decagon perimeter = 10, Decagon side = 11, Decagon area = 11, Decagon perimeter = 11, Decagon side = 12, Decagon area = 12, Decagon perimeter = 12, Decagon side = 13, Decagon area = 13, Decagon perimeter = 13, Decagon side = 14, Decagon area = 14, Decagon perimeter = 14, Decagon side = 15, Decagon area = 15, Decagon perimeter = 15, Decagon side = 16, Decagon area = 16, Decagon perimeter = 16, Decagon side = 17, Decagon area = 17, Decagon perimeter = 17, Decagon side = 18, Decagon area = 18, Decagon perimeter = 18, Decagon side = 19, Decagon area = 19, Decagon perimeter = 19, Decagon side = 20, Decagon area = 20, Decagon perimeter = 20 
[+] Equilateral TriangleGiven a side (a), this calculates the following items of the equilateral triangle:
* Perimeter (P)
* SemiPerimeter (s)
* Area (A)
* altitudes (h_{a},h_{b},h_{c})
* medians (m_{a},m_{b},m_{c})
* angle bisectors (t_{a},t_{b},t_{c})
* Circumscribed Circle Radius (R)
* Inscribed Circle Radius (r)
Features: Calculator  Quiz Generator  Practice Problem Generator  Watch the Video
Examples (20): equilateral triangle side = 1, equilateral triangle side = 2, equilateral triangle side = 3, equilateral triangle side = 4, equilateral triangle side = 5, equilateral triangle side = 6, equilateral triangle side = 7, equilateral triangle side = 8, equilateral triangle side = 9, equilateral triangle side = 10, equilateral triangle side = 11, equilateral triangle side = 12, equilateral triangle side = 13, equilateral triangle side = 14, equilateral triangle side = 15, equilateral triangle side = 16, equilateral triangle side = 17, equilateral triangle side = 18, equilateral triangle side = 19, equilateral triangle side = 20Tags: altitude, area, perimeter, triangle

[+] Eulers Formula for Planar Geometry 
[+] Geometric Mean of a Triangle 
[+] Golden Ratio 
[+] HeptagonSolves for side length, perimeter, and area of a heptagon.
Features: Calculator  Practice Problem Generator
Examples (60): Heptagon side = 1, Heptagon area = 1, Heptagon perimeter = 1, Heptagon side = 2, Heptagon area = 2, Heptagon perimeter = 2, Heptagon side = 3, Heptagon area = 3, Heptagon perimeter = 3, Heptagon side = 4, Heptagon area = 4, Heptagon perimeter = 4, Heptagon side = 5, Heptagon area = 5, Heptagon perimeter = 5, Heptagon side = 6, Heptagon area = 6, Heptagon perimeter = 6, Heptagon side = 7, Heptagon area = 7, Heptagon perimeter = 7, Heptagon side = 8, Heptagon area = 8, Heptagon perimeter = 8, Heptagon side = 9, Heptagon area = 9, Heptagon perimeter = 9, Heptagon side = 10, Heptagon area = 10, Heptagon perimeter = 10, Heptagon side = 11, Heptagon area = 11, Heptagon perimeter = 11, Heptagon side = 12, Heptagon area = 12, Heptagon perimeter = 12, Heptagon side = 13, Heptagon area = 13, Heptagon perimeter = 13, Heptagon side = 14, Heptagon area = 14, Heptagon perimeter = 14, Heptagon side = 15, Heptagon area = 15, Heptagon perimeter = 15, Heptagon side = 16, Heptagon area = 16, Heptagon perimeter = 16, Heptagon side = 17, Heptagon area = 17, Heptagon perimeter = 17, Heptagon side = 18, Heptagon area = 18, Heptagon perimeter = 18, Heptagon side = 19, Heptagon area = 19, Heptagon perimeter = 19, Heptagon side = 20, Heptagon area = 20, Heptagon perimeter = 20 
[+] HexagonThis calculator solves for side length (s), Area (A), and Perimeter (P) of a hexagon given one of the 3 entries.
Features: Calculator  Quiz Generator  Practice Problem Generator  Watch the Video
Examples (60): Hexagon side = 1, Hexagon area = 1, Hexagon perimeter = 1, Hexagon side = 2, Hexagon area = 2, Hexagon perimeter = 2, Hexagon side = 3, Hexagon area = 3, Hexagon perimeter = 3, Hexagon side = 4, Hexagon area = 4, Hexagon perimeter = 4, Hexagon side = 5, Hexagon area = 5, Hexagon perimeter = 5, Hexagon side = 6, Hexagon area = 6, Hexagon perimeter = 6, Hexagon side = 7, Hexagon area = 7, Hexagon perimeter = 7, Hexagon side = 8, Hexagon area = 8, Hexagon perimeter = 8, Hexagon side = 9, Hexagon area = 9, Hexagon perimeter = 9, Hexagon side = 10, Hexagon area = 10, Hexagon perimeter = 10, Hexagon side = 11, Hexagon area = 11, Hexagon perimeter = 11, Hexagon side = 12, Hexagon area = 12, Hexagon perimeter = 12, Hexagon side = 13, Hexagon area = 13, Hexagon perimeter = 13, Hexagon side = 14, Hexagon area = 14, Hexagon perimeter = 14, Hexagon side = 15, Hexagon area = 15, Hexagon perimeter = 15, Hexagon side = 16, Hexagon area = 16, Hexagon perimeter = 16, Hexagon side = 17, Hexagon area = 17, Hexagon perimeter = 17, Hexagon side = 18, Hexagon area = 18, Hexagon perimeter = 18, Hexagon side = 19, Hexagon area = 19, Hexagon perimeter = 19, Hexagon side = 20, Hexagon area = 20, Hexagon perimeter = 20Tags: area, hexagon, perimeter

[+] Isosceles Triangle 
[+] KitesThis calculates perimeter and/or area of a kite given certain inputs such as short and long side, short and long diagonal, or angle between short and long side
Features: CalculatorTags: area, kite, perimeter

[+] NonagonCalculates the side, perimeter, and area of a nonagon
Features: Calculator  Practice Problem Generator
Examples (60): Nonagon side = 1, Nonagon area = 1, Nonagon perimeter = 1, Nonagon side = 2, Nonagon area = 2, Nonagon perimeter = 2, Nonagon side = 3, Nonagon area = 3, Nonagon perimeter = 3, Nonagon side = 4, Nonagon area = 4, Nonagon perimeter = 4, Nonagon side = 5, Nonagon area = 5, Nonagon perimeter = 5, Nonagon side = 6, Nonagon area = 6, Nonagon perimeter = 6, Nonagon side = 7, Nonagon area = 7, Nonagon perimeter = 7, Nonagon side = 8, Nonagon area = 8, Nonagon perimeter = 8, Nonagon side = 9, Nonagon area = 9, Nonagon perimeter = 9, Nonagon side = 10, Nonagon area = 10, Nonagon perimeter = 10, Nonagon side = 11, Nonagon area = 11, Nonagon perimeter = 11, Nonagon side = 12, Nonagon area = 12, Nonagon perimeter = 12, Nonagon side = 13, Nonagon area = 13, Nonagon perimeter = 13, Nonagon side = 14, Nonagon area = 14, Nonagon perimeter = 14, Nonagon side = 15, Nonagon area = 15, Nonagon perimeter = 15, Nonagon side = 16, Nonagon area = 16, Nonagon perimeter = 16, Nonagon side = 17, Nonagon area = 17, Nonagon perimeter = 17, Nonagon side = 18, Nonagon area = 18, Nonagon perimeter = 18, Nonagon side = 19, Nonagon area = 19, Nonagon perimeter = 19, Nonagon side = 20, Nonagon area = 20, Nonagon perimeter = 20 
[+] OctagonCalculate side, area, and perimeter of an octagon based on inputs
Features: Calculator  Quiz Generator  Practice Problem Generator
Examples (60): Octagon side = 1, Octagon area = 1, Octagon perimeter = 1, Octagon side = 2, Octagon area = 2, Octagon perimeter = 2, Octagon side = 3, Octagon area = 3, Octagon perimeter = 3, Octagon side = 4, Octagon area = 4, Octagon perimeter = 4, Octagon side = 5, Octagon area = 5, Octagon perimeter = 5, Octagon side = 6, Octagon area = 6, Octagon perimeter = 6, Octagon side = 7, Octagon area = 7, Octagon perimeter = 7, Octagon side = 8, Octagon area = 8, Octagon perimeter = 8, Octagon side = 9, Octagon area = 9, Octagon perimeter = 9, Octagon side = 10, Octagon area = 10, Octagon perimeter = 10, Octagon side = 11, Octagon area = 11, Octagon perimeter = 11, Octagon side = 12, Octagon area = 12, Octagon perimeter = 12, Octagon side = 13, Octagon area = 13, Octagon perimeter = 13, Octagon side = 14, Octagon area = 14, Octagon perimeter = 14, Octagon side = 15, Octagon area = 15, Octagon perimeter = 15, Octagon side = 16, Octagon area = 16, Octagon perimeter = 16, Octagon side = 17, Octagon area = 17, Octagon perimeter = 17, Octagon side = 18, Octagon area = 18, Octagon perimeter = 18, Octagon side = 19, Octagon area = 19, Octagon perimeter = 19, Octagon side = 20, Octagon area = 20, Octagon perimeter = 20 
[+] Pentagons 
[+] Plane Geometry Operations 
[+] Plane Geometry Operations 
[+] Polygon Side 
[+] PolygonsUsing various input scenarios of a polygon such as side length, number of sides, apothem, and radius, this calculator determines Perimeter or a polygon and Area of the polygon.
This also determines interior angles of a polygon and diagonals of a polygon as well as the total number of 1 vertex diagonals.
Features: Calculator
Examples (3): diagonals for polygon with 10 sides, interior angle with 7 sided polygon, vertex for polygon with 5 sidesTags: apothem, area, diagonal, perimeter, polygon, radius

[+] Pyramids 
[+] QuadrilateralGiven 4 points entered, this determines the area using Brahmaguptas Formula and perimeter of the quadrilateral formed by the points as well as checking to see if the quadrilateral (quadrangle) is a parallelogram.
Features: Calculator  Watch the Video
Examples (1): (0,0),(5,10),(10,15),(5,5)Tags: parallelogram, perimeter, quadrilateral

[+] Rectangles and ParallelogramsSolve for Area, Perimeter, length, and width of a rectangle or parallelogram and also calculates the diagonal length as well as the circumradius and inradius.
Features: Calculator  Quiz Generator  Practice Problem Generator  Watch the VideoTags: area, circumradius, inradius, length, parallelogram, perimeter, rectangle, width

[+] Rectangular Solid 
[+] Rhombus 
[+] Right Triangles 
[+] Special Triangles: Isosceles and 306090 
[+] Spheres 
[+] Squares 
[+] Tetrahedron Marble Problem 
[+] TorusCalculates the volume of a torus and surface area of a torus given major radius and minor radius.
Features: Calculator  Quiz Generator
Examples (0): 
[+] Trapezoids 
[+] Triangle Coordinate ItemsEnter 3 points for the vertices of a triangle, and this will calculate the area of that triangle and the centroid.
Features: Calculator  Quiz Generator  Practice Problem Generator  Watch the Video
Examples (2): (1,1),(2,3),(4,5), (2,2)(3,4)(8,9)Tags: area, centroid, triangle, vertices

[+] Triangle InequalityThis calculator displays 2 scenarios 1) Enter 3 sides of a triangle, and it will determine if the side lengths satisfy the properties of the triangle inequality and form a triangle 2) Enter 2 sides of a triangle, and this will determine an acceptable range for the length of the 3rd side of a triangle so that the 3rd side respects the Triangle Inequality.
Features: Calculator  Quiz Generator  Practice Problem Generator  Watch the VideoTags: inequality, triangle

[+] Unit Circle 