The ornament consists of one square and four dark semicircles. The area of the square is 4 cm2. Find the area of one dark semicircle and round the result to hundreds.

Correct answer:

S =  1.57 cm2

Step-by-step explanation:

S1=4 cm2  S1=a2  a=S1=4=2 cm  a=2 r  r=a/2=2/2=1  S=21 π r2=21 3.1416 12=1.57 cm2

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