### Home > A2C > Chapter 4 > Lesson 4.2.4 > Problem 4-126

4-126.

Find the value of .

Use the Pythagorean Theorem.

Use the positive side length.

See part (a).

You can use special triangles 30-60-90 and 45-45-90, or solve by using the Law of Sines.

Remember to check your work.