Half of a circle
1 circle=360
1/2 circle=360/2=180
1/2 circle cut into 1/3
180 times 1/3=60
60 degreees
AOB = 2 . x
2x = 60°
x = 30°
the only like-terms are on the right-hand-side, since the left-hand-side has only 1 term anyway.

Answer:
1032 yds
Step-by-step explanation:
Al =(a+b+c)h