Question

What is the circumference of the half circle?

Answer 1

Answer:

4π cm

Step-by-step 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' = $\frac{2\pi r}{2} = \pi r$

SOLUTION :-

Radius = $\frac{Diameter}{2} = \frac{8}{2} = 4$

So , Circumference of half-circle = $\pi \times 4 = 4\pi$ cm