3-dimensional pointsCalculates 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 TriangleGiven an angle ratio for a triangle of a:b:c, this determines the angle measurements of the triangle.
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Watch the VideoAnnulusCalculates 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 FormulaCalculates the area of a quadrilateral using Bretschneiders Formula
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Watch the VideoCardioidShows 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 RelationsGiven a triangle with a cevian, this will solve for the cevian or segments or sides based on inputs
CalculatorChordSolves for any of the 3 items in the Chord of a Circle equation, Chord Length (c), Radius (r), and center to chord midpoint (t).
CalculatorCirclesCalculates and solves for Radius, Diameter, Circumference, and Area of a Circle.
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Watch the VideoClock AngleCalculate 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 MeetCalculates the first time on a clock when the hands will meet or touch again.
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Watch the VideoConesCalculates and solves for Radius, height, Volume (Capacity), Lateral Area, and Surface Area of a Cone.
CalculatorConsecutive Interior AnglesShows you a proof of consecutive interior angles using parallel lines and a transversal
LessonCost FunctionCreates a cost function from cost word problems
CalculatorCubeSolves for Volume (Capacity), Lateral Area,Surface Area, and the value of a side for a cube.
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Watch the VideoCuboidCalculates the volume, surface area, diagonals, and space diagonal for a cuboid
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Watch the VideoCylindersCalculates and solves for Radius, Diameter, Volume (Capacity), Lateral Area, and Surface Area of a Cylinder.
CalculatorDecagonSolves for the side, perimeter, and area of a decagon.
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Watch the VideoEquilateral TriangleGiven 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 GeometryShows you the area, arc length, polar equation of the horizontal cardioid, and the polar equation of the vertical cardioid
LessonEulers Formula for Planar GeometryThis 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 TriangleGiven certain segments of a special right triangle, this will calculate other segments using the geometric mean
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Watch the VideoGolden RatioSolves 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 VideoHemisphereCalculates 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 VideoHeptagonSolves for side length, perimeter, and area of a heptagon.
CalculatorHexagonThis 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 TriangleGiven 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 VideoKitesThis 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
CalculatorNonagonCalculates the side, perimeter, and area of a nonagon
CalculatorOctagonCalculate side, area, and perimeter of an octagon based on inputs
CalculatorPentagonsGiven a side length and an apothem, this calculates the perimeter and area of the pentagon.
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Watch the VideoPick's TheoremThis 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 OperationsEvaluates and simplifies various plane geometry notation and operations
CalculatorPolygon SideDetermines the sides of a polygon given an interior angle sum.
CalculatorPolygonsUsing 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.
CalculatorPyramidsSolves for Volume (Capacity), Surface Area, height, or radius of a Pyramid.
CalculatorQuadrilateralGiven 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 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.
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Watch the VideoRectangular SolidSolves for Volume (Capacity) of rectangular solid
Lateral Area of rectangular Solid
Surface Area of rectangular solid.
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Watch the VideoRhombusGiven 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 TrianglesThis 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 30-60-90Given 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 VideoSpheresCalculates and solves for Volume (Capacity), Surface Area, and Radius of a Sphere.
CalculatorSquaresSolve 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 ProblemWord problem using marbles in a cylinder jar that forms a tetrahedron.
CalculatorTorusCalculates the volume of a torus and surface area of a torus given major radius and minor radius.
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Watch the VideoTrapezoidsThis calculator determines the following items for a trapezoid based on given inputs:
* Area of trapezoid
* Perimeter of a Trapezoid
CalculatorTriangle Coordinate ItemsEnter 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 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.
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Watch the VideoTrianglesThis 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 ProofShows you the details behind a two column proof including the five parts and examples
LessonWhat is a LineThis 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 BisectorThis 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 PointThis 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 RayThis 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 SegmentThis 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 AngleThis lesson walks you through what an angle is and how to use it
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