Question

Find the area of semi circle whose perimeter is 54 cm

Answer 1

Answer:

Step-by-step explanation:

Perimeter of semi-circle = (pi)r + 2r = 54 => r = 54/(pi + 2).

Area of semi-circle A = (1/2)(pi)r^2 = (1/2)(pi)(54/(pi + 2))^2 = 173.2655 cm^2.

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Answer 2

given
perimeter of circle is 54 CM
perimeter of circle is 2 Pi R
54 = 2 pi r
54=2× 3.14 r
54 × 7 / 2× 3.14 = r
28 . 89 = r
area of semicircle is equal to Pi R Square /2
3.14 × 28 . 89 × 28 . 89 /2
1310.37 ( approx )