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Home > CCG > Chapter 6 > Lesson 6.1.2 > Problem 6-15


Examine the triangles below. For each one, solve for and name which tool you used. Show all work.

  1. Which trigonometric ratio can you use to solve for ?

  1. What do the tick marks on the sides of the triangle mean?
    How can you use that knowledge to solve for ?

    Because of the marks, the lengths of the sides are the same.

    Since this is a Right Isosceles triangle, use the Pythagorean Theorem.

  1. Use the Law of Cosines to solve for .