[ Kids/Teens ] Facts about an area; a way to measure how much flat space a two-dimensional (flat) surface covers.

[ Teens ] Use these simple illustrated formulas to calculate volume and surface area of various shapes.

[ Teens/Mature Teens ] Slice and complete various figures to form requested shapes.

[ Teens/Mature Teens ] Shows different types of straight-sided shapes with up to ten sides. Gives the total number of degrees for each side.

[ Teens/Mature Teens ] Covers the life of Euclid and a discussion of Euclidean geometry.

[ Teens/Mature Teens ] Explains and describes geometric terms, measurement of angles, types of figures, coordinate graphs, areas and volumes.

[ Kids/Teens ] Facts about Pi, a special number in math.

[ Kids/Teens ] Facts about Pythagorean theorem is a super important rule in mathematics that talks about the sides of a special kind of triangle called a right triangle.

[ Mature Teens ] Features a discussion about the works of two teenagers, David Goldenheim and Daniel Litchfieldm, from Connecticut. They helped find a solution that eluded Euclid in finding a method to partition a line into any number of equal sections.

[ Teens/Mature Teens ] Learn about the basic properties, formulas, theorems and different types of triangles. Includes proofs and illustrations.