1)

2)

each of other angles measures 82.5 degrees
3)

4)sorry I don't know the last one
625+625=1250
hope this helped
Answer:
about 7 units
Step-by-step explanation:
10
A fraternity name formed by two letters would have 24 choices for the first letter, and 24 choices for the second, therefore 24*24=576 is the correct answer.
Answer:
r= 9
Step-by-step explanation:
radius (r) = diameter (D)/2
= 18/2
= 9