### Home > INT2 > Chapter 3 > Lesson 3.2.1 > Problem3-72

3-72.

Use what you know about the angles of a triangle to determine the value of x and the angle(s) in each triangle below. Homework Help ✎

Use the Triangle Angle Sum Theorem.

 a. Hint (a):$x + 79° + 90° = 180°$ b. Hint (b):$x + x + 90° = 180°$ c. Answer (c):$x = 30°$ d. Answer (d):$x = 68°$