Calculates distance between two 3-dimensional points
(x₁, y₁, z₁) and (x₂, y₂, z₂) as well as the parametric equations and symmetric equations

Given an angle ratio for a triangle of a:b:c, this determines the angle measurements of the triangle.

Calculates the area of an annulus and the equation of the annulus using the radius of the large and small concentric circles.

Calculates the area of a quadrilateral using Bretschneiders Formula

Shows you the area, arc length, polar equation of the horizontal cardioid, and the polar equation of the vertical cardioid

Given a triangle with a cevian, this will solve for the cevian or segments or sides based on inputs

Solves for any of the 3 items in the Chord of a Circle equation, Chord Length (c), Radius (r), and center to chord midpoint (t).

Calculates and solves for Radius, Diameter, Circumference, and Area of a Circle.

Calculate the angle on a clock between the hour and minute hands or how many times on the clock form an angle of (x°) between the minute and hour hand (backwards and forwards). Clock Angle Calculator

Calculates the first time on a clock when the hands will meet or touch again.

Calculates and solves for Radius, height, Volume (Capacity), Lateral Area, and Surface Area of a Cone.

Shows you a proof of consecutive interior angles using parallel lines and a transversal

Creates a cost function from cost word problems

Solves for Volume (Capacity), Lateral Area,Surface Area, and the value of a side for a cube.

Calculates the volume, surface area, diagonals, and space diagonal for a cuboid

Calculates and solves for Radius, Diameter, Volume (Capacity), Lateral Area, and Surface Area of a Cylinder.

Solves for the side, perimeter, and area of a decagon.

Given a side (a), this calculates the following items of the equilateral triangle:
* Perimeter (P)
* Semi-Perimeter (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)

Shows you the area, arc length, polar equation of the horizontal cardioid, and the polar equation of the vertical cardioid

This calculator solves for any one of the 3 following items using Eulers Formula for planar geometry:
* Vertices (v)
* Faces (f)
* Edges (e)

Given certain segments of a special right triangle, this will calculate other segments using the geometric mean

Solves for 2 out of the 3 variables for a segment broken in 2 pieces that satisfies the Golden Ratio (Golden Mean).
(a) Large Segment
(b) Small Segment
(a + b) Total Segment

Calculates the base circumference, volume, curved surface area, base surface area, total surface area of a hemisphere with radius r

Solves for side length, perimeter, and area of a heptagon.

This calculator solves for side length (s), Area (A), and Perimeter (P) of a hexagon given one of the 3 entries.

Given a long side (a) and a short side (b), this determines the following items of the isosceles triangle:
* Area (A)
* Semi-Perimeter (s)
* Altitude a (ha)
* Altitude b (hb)
* Altitude c (hc)

This 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

Calculates the side, perimeter, and area of a nonagon

Calculate side, area, and perimeter of an octagon based on inputs

Given a side length and an apothem, this calculates the perimeter and area of the pentagon.

This calculator determines the area of a simple polygon using interior points and boundary points using Pick's Theorem

Evaluates and simplifies various plane geometry notation and operations

Determines the sides of a polygon given an interior angle sum.

Using 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.

Solves for Volume (Capacity), Surface Area, height, or radius of a Pyramid.

Given 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.

Solve for Area, Perimeter, length, and width of a rectangle or parallelogram and also calculates the diagonal length as well as the circumradius and inradius.

Solves for Volume (Capacity) of rectangular solid
Lateral Area of rectangular Solid
Surface Area of rectangular solid.

Given inputs of a rhombus, this calculates the following:
Perimeter of a Rhombus
Area of a Rhombus
Side of a Rhombus

This solves for all the pieces of a right triangle based on given inputs using items like the sin ratio, cosine ratio, tangent ratio, and the Pythagorean Theorem as well as the inradius.

Given an Isosceles triangle (45-45-90) or 30-60-90 right triangle, the calculator will solve the 2 remaining sides of the triangle given one side entered.

Calculates and solves for Volume (Capacity), Surface Area, and Radius of a Sphere.

Solve for Area of a square, Perimeter of a square, side of a square, diagonal of a square.

Word problem using marbles in a cylinder jar that forms a tetrahedron.

Calculates the volume of a torus and surface area of a torus given major radius and minor radius.

This calculator determines the following items for a trapezoid based on given inputs:
* Area of trapezoid
* Perimeter of a Trapezoid

Enter 3 points for the vertices of a triangle, and this will calculate the area of that triangle and the centroid.

This 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.

This lesson walks you through the basics of a triangle and shows you triangle types like acute, right, obtuse, scalene, isosceles, equilateral.

Shows you the details behind a two column proof including the five parts and examples

This lesson walks you through what a line is and the various implications of a line in geometry

This lesson walks you through what a perpendicular bisector is and the various properties of the segment it bisects and the angles formed by the bisection

This lesson walks you through what a point is and the various implications of a point in geometry

This lesson walks you through what a Ray is and the various implications of a ray in geometry

This lesson walks you through what a segment is and the various implications of a segment in geometry including the midpoint of a segment.

This lesson walks you through what an angle is and how to use it