Question

how do you work out the radius of a semicircle when you only get the perimeter

Answer 1

Answer:

Calculating the Radius of a Semicircle With a Known Circumference

C = 2 π r C = 2\pi r C=2πr.

S C = 0.5 × 2 π r SC = 0.5 × 2 \pi r SC=0. 5×2πr.

S C = π r SC = \pi r SC=π

Step-by-step explanation:

Answer 2

Answer:

We can use simple equation

Step-by-step explanation:

Example: If the perimeter of a semicircle is 484 cm then the radius 'r' will be...

πr = 49       ( Perimeter of Semicircle is πr )

22/7 * r = 484

r = 484 * 7/22

r = 22 * 7 = 154

So the radius is 154 cm