Respuesta :

Space

Answer:

15

Step-by-step 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.

protecter4life

Step-by-step 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.

[tex]\frac{180}{15} = 12[/tex]