Answer:
(9π + 6)cm
Step-by-step explanation:
Circumference of a circle = 2πr
∴ length of the curve of a semicircle = πr
For the larger semicircle: 6π
For the smaller semicircle: 3π (diameter of smaller semicircle is 6)
Total perimeter is the length of the curved bits of the semicircles and the 6cm.
∴ perimeter = (9π + 6)cm
