Question

Find the total perimeter and area of a semi circle of diameter 7cm.

Answer 1

Answer:

radius of circle is 3.5 cm

Perimeter of semicircle=12×Circumference of the circle+Diameter.

Perimeter=12×2πr+2r.

=12 x 2 x 22/7 x 3.5 +2 x 3.5 = 271 cm

find :- The area of the semicircle,

Given: Diameter of the semicircle = 7cm

Radius of semicircle = 7/2 = 3.5 cm

Using semicircle formulas,

Area of Semicircle = 1/2 × (π r2)

Area = (π × 11.56)/2

=36.33 /2

= 18.165 cm^2

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