Triangle Angle Word Problem 2

In this lesson, Julie Harland explains how to solve a word problem involving angles in a triangle by remembering that the sum of the measures of the three angles of the triangle is 180 degrees. She demonstrates how to define the three angles and set up an equation to solve for their measures. By using algebra, she shows how to find each angle and check that the angles add up to 180 degrees. Finally, she emphasizes the importance of organizing and presenting the answer correctly.

Sum of angles in a triangle, isosceles triangle, right triangle word problems involving angles in a triangle.

• If one angle of a triangle is twice the measure of the second angle, and the third angle is 10 degrees less than the measure of the first angle, what is the measure of each angle?
• If the angles in a triangle are x, 2x, and 2x - 10, what does x equal and what are the measures of the angles in the triangle?
• How do you write and solve an equation to find the measures of angles in a triangle?