Question

7.5. 15. 30. None of the choices are correct.

Answer 1

Explanation:

∠ABC forms and Obtuse angle ( A measure greater than 90° but less than 180°)

mAB is 90° and mCB is 30°

If AB = 15, then CB must be 12.

`(180)/(15) = 12`

Answer 2

15

Explanation:

Since we are given 2 sets of angles, we can determine the 2 triangles as congruent using AA Congruence Theorem. So if mAB = 15, then mCB also equals 15.