3-dimensional pointsFree 3-dimensional points Calculator - Calculates distance between two 3-dimensional points
(x1, y1, z1) and (x2, y2, z2) as well as the parametric equations and symmetric equations
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Watch the VideoAngle Ratio for a TriangleFree Angle Ratio for a Triangle Calculator - Given an angle ratio for a triangle of a:b:c, this determines the angle measurements of the triangle.
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Watch the VideoAnnulusFree Annulus Calculator - Calculates the area of an annulus and the equation of the annulus using the radius of the large and small concentric circles.
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Watch the VideoBretschneiders FormulaFree Bretschneiders Formula Calculator - Calculates the area of a quadrilateral using Bretschneiders Formula
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Watch the VideoCardioidFree Cardioid Calculator - Shows you the area, arc length, polar equation of the horizontal cardioid, and the polar equation of the vertical cardioid
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Watch the VideoCevian Triangle RelationsFree Cevian Triangle Relations Calculator - Given a triangle with a cevian, this will solve for the cevian or segments or sides based on inputs
CalculatorChordFree Chord Calculator - 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).
CalculatorCirclesFree Circles Calculator - Calculates and solves for Radius, Diameter, Circumference, and Area of a Circle.
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Watch the VideoClock AngleFree Clock Angle Calculator - 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
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Watch the VideoClock Hands MeetFree Clock Hands Meet Calculator - Calculates the first time on a clock when the hands will meet or touch again.
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Watch the VideoConesFree Cones Calculator - Calculates and solves for Radius, height, Volume (Capacity), Lateral Area, and Surface Area of a Cone.
CalculatorConsecutive Interior AnglesFree Consecutive Interior Angles Calculator - Shows you a proof of consecutive interior angles using parallel lines and a transversal
LessonCubeFree Cube Calculator - Solves for Volume (Capacity), Lateral Area,Surface Area, and the value of a side for a cube.
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Watch the VideoCuboidFree Cuboid Calculator - Calculates the volume, surface area, diagonals, and space diagonal for a cuboid
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Watch the VideoCylindersFree Cylinders Calculator - Calculates and solves for Radius, Diameter, Volume (Capacity), Lateral Area, and Surface Area of a Cylinder.
CalculatorDecagonFree Decagon Calculator - Solves for the side, perimeter, and area of a decagon.
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Watch the VideoEquilateral TriangleFree Equilateral Triangle Calculator - Given a side (a), this calculates the following items of the equilateral triangle:
* Perimeter (P)
* Semi-Perimeter (s)
* Area (A)
* altitudes (ha,hb,hc)
* medians (ma,mb,mc)
* angle bisectors (ta,tb,tc)
* Circumscribed Circle Radius (R)
* Inscribed Circle Radius (r)
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Watch the VideoEuclidean GeometryFree Euclidean Geometry Calculator - Shows you the area, arc length, polar equation of the horizontal cardioid, and the polar equation of the vertical cardioid
LessonEulers Formula for Planar GeometryFree Eulers Formula for Planar Geometry Calculator - This calculator solves for any one of the 3 following items using Eulers Formula for planar geometry:
* Vertices (v)
* Faces (f)
* Edges (e)
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Watch the VideoGeometric Mean of a TriangleFree Geometric Mean of a Triangle Calculator - Given certain segments of a special right triangle, this will calculate other segments using the geometric mean
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Watch the VideoGolden RatioFree Golden Ratio Calculator - 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
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Watch the VideoHemisphereFree Hemisphere Calculator - Calculates the base circumference, volume, curved surface area, base surface area, total surface area of a hemisphere with radius r
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Watch the VideoHeptagonFree Heptagon Calculator - Solves for side length, perimeter, and area of a heptagon.
CalculatorHexagonFree Hexagon Calculator - This calculator solves for side length (s), Area (A), and Perimeter (P) of a hexagon given one of the 3 entries.
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Watch the VideoIsosceles TriangleFree Isosceles Triangle Calculator - 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)
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Watch the VideoKitesFree Kites Calculator - 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
CalculatorNonagonFree Nonagon Calculator - Calculates the side, perimeter, and area of a nonagon
CalculatorOctagonFree Octagon Calculator - Calculate side, area, and perimeter of an octagon based on inputs
CalculatorPentagonsFree Pentagons Calculator - Given a side length and an apothem, this calculates the perimeter and area of the pentagon.
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Watch the VideoPick's TheoremFree Pick's Theorem Calculator - This calculator determines the area of a simple polygon using interior points and boundary points using Pick's Theorem
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Watch the VideoPlane Geometry OperationsFree Plane Geometry Operations Calculator - Evaluates and simplifies various plane geometry notation and operations
CalculatorPolygon SideFree Polygon Side Calculator - Determines the sides of a polygon given an interior angle sum.
CalculatorPolygonsFree Polygons Calculator - 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.
CalculatorPyramidsFree Pyramids Calculator - Solves for Volume (Capacity), Surface Area, height, or radius of a Pyramid.
CalculatorQuadrilateralFree Quadrilateral Calculator - 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.
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Watch the VideoRectangles and ParallelogramsFree Rectangles and Parallelograms Calculator - 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.
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Watch the VideoRectangular SolidFree Rectangular Solid Calculator - Solves for Volume (Capacity) of rectangular solid
Lateral Area of rectangular Solid
Surface Area of rectangular solid.
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Watch the VideoRhombusFree Rhombus Calculator - Given inputs of a rhombus, this calculates the following:
Perimeter of a Rhombus
Area of a Rhombus
Side of a Rhombus
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Watch the VideoRight TrianglesFree Right Triangles Calculator - 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.
CalculatorSpecial Triangles: Isosceles and 30-60-90Free Special Triangles: Isosceles and 30-60-90 Calculator - 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.
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Watch the VideoSpheresFree Spheres Calculator - Calculates and solves for Volume (Capacity), Surface Area, and Radius of a Sphere.
CalculatorSquaresFree Squares Calculator - Solve for Area of a square, Perimeter of a square, side of a square, diagonal of a square.
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Watch the VideoTetrahedron Marble ProblemFree Tetrahedron Marble Problem Calculator - Word problem using marbles in a cylinder jar that forms a tetrahedron.
CalculatorTorusFree Torus Calculator - Calculates the volume of a torus and surface area of a torus given major radius and minor radius.
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Watch the VideoTrapezoidsFree Trapezoids Calculator - This calculator determines the following items for a trapezoid based on given inputs:
* Area of trapezoid
* Perimeter of a Trapezoid
CalculatorTriangle Coordinate ItemsFree Triangle Coordinate Items Calculator - Enter 3 points for the vertices of a triangle, and this will calculate the area of that triangle and the centroid.
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Watch the VideoTriangle InequalityFree Triangle Inequality Calculator - 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.
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Watch the VideoTrianglesFree Triangles Calculator - This lesson walks you through the basics of a triangle and shows you triangle types like acute, right, obtuse, scalene, isosceles, equilateral.
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Watch the VideoTwo Column ProofFree Two Column Proof Calculator - Shows you the details behind a two column proof including the five parts and examples
LessonWhat is a LineFree What is a Line Calculator - This lesson walks you through what a line is and the various implications of a line in geometry
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Watch the VideoWhat is a Perpendicular BisectorFree What is a Perpendicular Bisector Calculator - 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
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Watch the VideoWhat is a PointFree What is a Point Calculator - This lesson walks you through what a point is and the various implications of a point in geometry
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Watch the VideoWhat is a RayFree What is a Ray Calculator - This lesson walks you through what a Ray is and the various implications of a ray in geometry
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Watch the VideoWhat is a SegmentFree What is a Segment Calculator - This lesson walks you through what a segment is and the various implications of a segment in geometry including the midpoint of a segment.
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Watch the VideoWhat is an AngleFree What is an Angle Calculator - This lesson walks you through what an angle is and how to use it
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