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Can some one help me ASAP

Can some one help me ASAP-example-1
User Hamada
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1 Answer

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17) is D. since triangle MNP is equilateral those two segments are the same length

18)A=πr²
78.5=πr²
78.5/π=r²
24.987=r²
r=4.999 or about 5
diameter is double the radius, our 2(5)=10
c=πd
c=π•10
answer is B
User Chinmay Atrawalkar
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