Answer:
for a, look at my picture
b = 19.5 inches
Step-by-step explanation:
A is simple. thats my take on it, but other people coudl've drawn it differently
B is more difficult. I made triangle QRS like that so i can make a ratio.
My ratio:
QX:QY = QR:QS
8:12=13:QS
13*12 = 8*QS
156/8 = 19.5
therefore 19.5 inches
