Triangle Angle Word Problem 5

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Taught by YourMathGal
  • Currently 4.0/5 Stars.
5529 views | 1 rating
Part of video series
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Lesson Summary:

In this lesson, Julie Harland teaches us how to solve problems involving the angles in a triangle. She goes through three problems, including one that doesn't involve a triangle. With her guidance, we learn how to use our knowledge of geometry to find missing angles. By the end of the lesson, we can confidently tackle word problems that involve isosceles and right triangles.

Lesson Description:

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

Questions answered by this video:
  • If 100, 105, and A are exterior, supplementary angles to the 3 angles in a triangle, what does A equal?
  • If the angles of a triangle are 120, 20, and B, what does B equal?
  • If 35 and A are supplementary angles, what does A equal?
  • Staff Review

    • Currently 4.0/5 Stars.
    This lesson goes through 3 more problems, using all of your knowledge of triangles and angle measures. These are slightly more challenging, and the third problem does not involve triangles at all, but simply your knowledge of angles. All steps involved in solving the 3 problems are shown.