Question

Find the circumference and area of semi circle whose radius=5cm

Answer 1

Answer:

Step-by-step explanation:

Circumference of a semi circle = length of the curved side + length of straight edge

length of the curved side = circumference of the circle / 2 = πr

length of the straight edge = diameter = 2r

So circumference of the semi circle = πr+2r

=3.14x5 + 2x5

= 25.7 cm

Area of the semicircle = area of the circle /2

=πr²/2

=3.14x5²/2

=39.25 cm²