Answer:

Step-by-step explanation:
We know that 
Also , 
So ,

Answer: 12
Step-by-step explanation:
since it’s isosceles, the bottom two angles are equal so just subtract 156 from 180 and then divide that by 2.
Answer:
286 in³
Step-by-step explanation:
7×5 = 35
35×2 = 70in
9×5 = 45
45×2 = 90in
9×7 = 63
63×2 = 126in
70+90+126
=286in³
Answer:
A) 25
B) 64
Step-by-step explanation:
Hope this helps :))