Answer :

chadislice

Answer:

4.71 (corrected to 3 significant figures)

Step-by-step explanation:

12 is the diameter of the big semicircle and 6 for the small semicircle

the radii of the big and small circles are 6 and 3 cm respectively

(6/2 × 3.14) - (3/2 x 3.14) = 4.712388.. = 4.71

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