WHAT IS RECALL?
RECALL is real exam questions according to latest examinee’s recall (REQALER).
There is a playground with two semicircles on both sides, a rectangle in the middle, and a layer of outer circle on the outside (it is also the same shape, but the radius of the semicircle is 8 larger than the radius of the inner circle). Find the difference between the perimeters of the inner and outer circles? Inner ring circumference 400
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