Question

Please help me answer this question
giving 25 points to whoever helps me

Answer 1

The perimeter of semi-circle is 3π cm.

Explanation:

It is given that the perimeter of circle is, P = 2×π×r. The diagram in this question is semi-circle which is half of circle so you have to divide the 2 to the formula :

Circle,

P = 2×π×r

Semi-circle,

P = (2×π×r)÷2

= π×r

Next, you have to substitute r value into the formula :

r = 3 cm

P = π×3

= 3π cm