Definition and properties of equiangular triangles
Math Open Reference

Definition and properties of the diameter of a circle
Math Open Reference

Formula and description of the volume of a cube.
Math Open Reference

Definiton and equation for a vertical line in coordinate geometry
Math Open Reference

Definition of a line segment when the defining points are on the coordinate plane
Math Open Reference

Area and perimeter of a rectangle (coordinate geometry)
Math Open Reference

Definiton and properties of a rectangle (coordinate geometry)
Math Open Reference

An animated demonstration showing how to use a protractor to measure an angle
Math Open Reference

How to draw an isosceles triangle given the base and altitude with compass and straightedge
Math Open Reference

How to draw an isosceles triangle with compass and straightedge
Math Open Reference
