Question

What is the area of a semi–circle of radius 5 cm? (a) 78.57 cm(b) 71.42 cm(c) 63.18 cm(d) 79.86 cm

Answer 1

Answer is 39.25 for semi-circle

and 78.57 for whole circle

Step-by-step explanation:

πr^2

3.14*5*5

=78.57 circle

77.57/2 = 39.25 semicircle

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Answer 2

Step-by-step explanation:

area of a circle is πr²

= π5² = π25

area of the semicircle will be half of the circle

therefore area = π25/2

= 22/7×25/2

=22×25/7×2 = 39.28

=area of the circle will be 78.57

area if the semicircle will be 39.28

ur options r incorrect

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