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9 votes
9 votes
Find the area of this semi-circle with diameter, d = 49cm.
Give your answer rounded to 2 DP.

User Michael Berezin
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2.6k points

1 Answer

9 votes
9 votes
the area of a semicircle is (πr^2)/2, with r being the radius
the radius is going to be the diameter diced by two: 49/2 = 24.5
now, plug in and solve
(π24.5^2)/2 = 600.25π/2 = 300.125 π
π is roughly equivalent to 3.14, so we can multiply to simplify
area = 942.87

User Jonathan Ringstad
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2.9k points