27-9r
explaintion:
3•9+3•-3r
27+3•-3r=
27-9r
211,135.71 merry christmas
Answer:
Part A :
Area = π*r² = π(d/2)² = π*(8/2)² =
π*4² = π*16 square inches
Part B:
d=8+4 = 12 and r = d/2 = 6 inches
We know :
Area = π*r²
Area = π*6²
=36π
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