### Home > INT2 > Chapter 12 > Lesson 12.2.4 > Problem 12-135

12-135.

The length of chord *AB* in ⊙*D* is 9 mm. If *m* = 32°, what is the length of

*? Draw a diagram. Homework Help ✎*

Notice the relationship between *AD* and *DB*.

Remember that the sum of the interior angles of a triangle is always 180°.

Rely on your trig ratios to solve for the length of the radius.

9.1 mm