Triangles: Using the Sum of the Angles Property
This clip explains how to use the sum of the angles property of triangles to find the measure of an unknown angle when the measure of the other two angles is known.
Triangles: Altitude in Triangles
This clip looks at a feature of isosceles triangles that has to do with altitude (or height). "The altitude is a perpendicular line segment from the base to the vertex of the opposite angle," the clip explains. "The altitude bisects the base and opp...
Triangles: Triangles: Practical Problems
This clip consists of several practical problems which the student can solve by applying the Pythagorean Theorem and other facts about triangles that have been discussed in previous clips.
Triangles: Introduction to Triangles
This clip talks about the ways in which triangles are used in various professions. It also introduces the different types of triangles (equilateral, scalene and isosceles).