A circle has a sector with area 45/4 pi and central angle of 9/10 pi radians. What is the area of the circle?
1 answer:
Answer:
the area of the circle: 25π
Step-by-step explanation:
45/4 π = 11.25π
9/10π = 0.9π
11.25π / 0.9π = x / 2π .... 360° = 2π
x = (11.25π x 2π) / 0.9π = 25π
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