Answer:
The perimeter of semi-circle is 3π cm.
Step-by-step 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
