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Stolb23 [73]
3 years ago
13

Please help greatly appreciated :)

Mathematics
2 answers:
USPshnik [31]3 years ago
4 0

Answer:

Today: Sunday, 11 October 2020

Hour: 23.05 WIB (Indonesian)

<u>_________________________</u>

D = 18

r = 18 ÷ 2 = 9

area of semicircle = πr²/2

area of semicircle = 3.142 . 9²/2

area of semicircle = 3.142 . 81/2

area of semicircle = 254.502/2

area of semicircle = 127.251 cm²

matrenka [14]3 years ago
3 0

Step-by-step explanation:

we know ,

area of circle =πr^2

hence we get from the figure that the diameter of circle is 19 cm and we can find radius

r=d/2

r=18/2=9cm

area of semicircle =πr^2/2

area of Semi circle equals to =22*(9)^2/7/2

=127.2857143

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