In this lesson, Julie Harland teaches viewers about the basic triangle and how the sum of the three angles forms a straight line, thus adding up to 180 degrees. She then uses this concept to solve word problems involving triangle angles, such as finding the missing angle when given two angles or finding the measures of angles in an isosceles triangle. Harland also emphasizes the importance of including the degree symbol in solutions and checking answers by adding up the measures of all three angles.
Sum of angles in a triangle, isosceles triangle, right triangle word problems involving angles in a triangle.
More free YouTube videos by Julie Harland are organized at http://yourmathgal.com