### Home > CCG > Chapter 5 > Lesson 5.1.3 > Problem 5-30

5-30.

Review the Math Notes box in Lesson 5.1.2.

With three known side lengths does it matter which trig ratio you use?

Remember when finding an angle measure you need to use inverse trigonometry.

5-30.

Review the Math Notes box in Lesson 5.1.2.

With three known side lengths does it matter which trig ratio you use?

Remember when finding an angle measure you need to use inverse trigonometry.