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Artist 52 [7]
2 years ago
11

Radius of a semi circle

Mathematics
2 answers:
Ivahew [28]2 years ago
8 0
The area for semi circle is: (pi)(r^2)/2

A= 3.142 x (8.2)^2 / 2

A= 110.8 cm^2
bulgar [2K]2 years ago
6 0
A=3.142*r^2
Area of the circle= 3.142*8.2^2
=211.26
Because it’s a semicircle, divide by two.
211.26/2 = 105.6
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50% is \frac{50}{100}
We have two ways to do this, pick your favor:
either by fractions:
\frac{5}{8} ÷ \frac{1}{2}
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Multiply by the reciprocal of \frac{1}{2} which is 2(flip it)

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multiply by 10 to make it easier to divide(it still gives us the same answer)
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3 years ago
Help me for 1????????
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Read 2 more answers
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