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3 years ago

Please helppp!! Round to the nearest hundredths

Mathematics

2 answers:

meriva3 years ago

7 0

Answer:

Step-by-step explanation:

diameter = 42 mm

radius (r) = 42/2 = 21mm

SA of semicircle = 3πr²

$=3*\frac{22}{7}*21*21\\\\=3*22*3*21\\\\=4158mm^{2}$

densk [106]3 years ago

3 0

Answer:1385.44mm sq

Step-by-step explanation: surface area of a circle = pi x radius squared

3.142 x 21 squared

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