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18 votes
18 votes
Work out the area of this semicircle.

Take to be 3.142 and write down all of the digits given by your calculator.
18 cm

Work out the area of this semicircle. Take to be 3.142 and write down all of the digits-example-1
User Vincent Bitter
by
2.4k points

1 Answer

14 votes
14 votes

Answer:

A = 127.251 cm²

Explanation:

the area (A) of a circle is calculated as

A = πr² ( where r is the radius )

the area (A) of a semicircle is then

A =
(1)/(2) πr²

given diameter = 18 then r = 18 ÷ 2 = 9 cm , so

A = 0.5 × 3.142 × 9² = 0.5 × 3.142 × 81 = 127.251 cm²

User QuikProBroNa
by
2.9k points
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