Find the perimeter of this semi-circle with radius, r = 49cm. Give your answer rounded to 1 DP

Question

i need to find the right aswer

Answer 1

If you draw a diagram of a semi-circle, you'll see that its perimeter is equal to one-half of the circumference of the full circle plus the length of the diameter:

Perimeter = (1/2)(Circumference of full circle) + Diameter

The circumference of the full circle is 2π·radius where π = 3.14 and the radius = 49 cm. The diameter is 2·radius.