Question

using the formula d=2r c=2nr or c =nd find the values of unknown variables c=198cm r? c=62.80cm take n = 3-14 d? r? ​

Answer 1

Answer:

1.

Circumference = 198 cm

then,

Radius = $\frac{7}{22}\times {\frac{1}{2}}\times 198cm$

= $\blue{126 cm}$

2.

Circumference = 62.80 cm

Radius = $\frac{7}{22}\times {\frac{1}{2}}\times 62.80cm$

=$\blue{9.99090909091cm}$