21. The diagram shows that x is the radius of
1 answer:
Answer:
Step-by-step explanation: the area of the circle is A=r%5E2%2Api
if x is the radius of the large circle, then r=x and the area of the larger circle is
A=x%5E2%2Api
and if x is the diameter of the small circle,then r=x%2F2 and the area of the smaller circle is
A=%28x%2F2%29%5E2%2Api->A=%28x%5E2%2F4%29%2Api
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