mathematicsonline

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Area of a circle, formula explained

How to create a square

History of Math: Cartesian Coordinate System

The Best Explanation of Pi

Why is it called a Truncated Cube?

Dodecahedron: find the volume and surface area

Truncated Cube

Proof by induction: Sum of interior angles of a polygon

Snub Dodecahedron

Icosidodecahedron

Great Rhombicuboctahedron

Archimedes derives the volume of a sphere

Octahedron (and cube): find the volume and surface area

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Lattice Platonic Solids

Solve a linear equation

Truncated Dodecahedron

Snub Cube

Great Rhombicosidodecahedron

Area of a parallelogram and trapezoid

What does truncated mean?

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History of Math PART 5

How to create a perpendicular line

Why is it called a Truncated Icosahedron?

How to bisect a line

(I.5) Base Angles of an Isosceles Triangle are Congruent, Proof

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Why is it called a truncated Dodecahedron?

(I.9) Bisecting An Angle Proof

(I.12) Construct a Perpendicular Line from a Point not on a Line, Proof

(I.27) Lines are Parallel when Alternate Interior Angles are Congruent, Proof

(I.10) Bisect a Line, Proof

(I.11) Construct a Perpendicular Line from a Point on a Line, Proof

Cuboctahedron

Rhombicosidodecahedron

How to create an equilateral triangle.

How do you create an isosceles triangle where the vertex angle is half the base angles.

Math SAT Q16

History of Math: Pythagorean Theorem

Truncated Octahedron

Reacting to Adam Savage 5 intersecting tetrahedra video

Deriving the Ellipse Equation

How to find prime numbers

Why is it called a Truncated Octahedron?

Rhombicuboctahedron

Truncated Icosahedron

Truncated Tetrahedron

Why are the sum of interior angles (n-2)180 ? Proof

Why are there only 5 platonic solids?