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SVETLANKA909090 [29]
3 years ago
11

Please help! I will mark you as brainliest!

Mathematics
2 answers:
Lisa [10]3 years ago
8 0

Answer:

105.6 cm²

Step-by-step explanation:

Area of full circle = π × r²

Semicircle = Half it

3.142 × 8.2² = 211.26808 ( Full circle)

211.26808 ÷ 2 = 105.63404

105.6 cm²

aliya0001 [1]3 years ago
6 0

Answer:

105.6 cm²

Step-by-step explanation:

The area (A) of a circle is calculated as

A = πr² ( r is the radius ), thus the area of a semicircle is half the area of the circle, that is

A = \frac{1}{2}πr² ( with r = 8.2 )

A = 0.5 × 3.142 × 8.2²

   = 0.5 × 3.142 × 67.24 ≈ 105.6 cm² ( to 1 dec. place )

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Answer:

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3 years ago
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sleet_krkn [62]
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slavikrds [6]
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