Question

What is the circumference of the half circle?

Answer 1

4π cm

Explanation:

GIVEN :-

• Diameter of half circle = 8cm

TO FIND :-

• Circumference of half circle

FACTS TO KNOW BEFORE SOLVING :-

Circumference of a circle with radius 'r' is =
`2\pi r`

⇒ Circumference of half-circle with radius 'r' =
`(2\pi r)/(2) = \pi r`

SOLUTION :-

Radius =
`(Diameter)/(2) = (8)/(2) = 4`

So , Circumference of half-circle =
`\pi * 4 = 4\pi` cm