I will assume that 0 =72 refers to that the angle of the sectoris 72°.
If so, this sector represents 72°/360° = 1/5 of the total circle.
Then the area of the total circles is 5 * 45yd^2 = 225 yd^2
The radius is obtained from:
Area = π(r^2) = 225 yd^2
r^2 = 225 yd^2 / π = 71.62 yd^2
r = √(71.62yd^2) = 8.5 yd
Answer: 8.5 yd
17-hundred blocks 1-ten block 8-ones block
10-hundred blocks 70-ten blocks 18-one block
Segment CB Is18cm and segment a is 6 cm therefore segment d is 8 cm