△abc△abc is similar to △qrs△qrs by the aa similarity postulateaa similarity postulate . the measure of ∠a∠a is 72º and the measure of ∠s∠s is 56º. what is m∠bm∠b?

For the answer to the question above asking What is m∠Bm∠B if △ABC△ABC is similar to △QRS△QRS by the AA Similarity PostulateAA Similarity Postulate. The measure of ∠A∠A is 72º and the measure of ∠S∠S is 56º?
180 - 56- 72 = 
the answer is 56°
I hope this helps

the image of (6, 9) under a dilation is (4, 6). the scale factor is

b. 2/3