This video explains how to find the height to of a triangle of circles with a know radius.
This video explains how to determine the perimeter of an equilateral triangle given the area with out using trigonometry.
This video provides an example of how to use a 30-60-90 triangle to determine the perimeter or an equilateral triangle. Complete Video Lists at www.mathispower4u.yolasite.com
This video provides a two column proof of the equilateral triangle theorem.
This video will show example problems of how to use the properties of equilateral triangles to solve for unknown values.
This video will show how to construct an equilateral triangle with a compass and straight edge.