Question

The circumference of a circle is a 12.1mm. Find the length of the radius. Give your answer rounded to 1 DP.​

Answer 1

1.9

Explanation:

r=C/2π

r-12.1/2π=1.9257...

Answer 2

1.9 mm

Explanation:

Circumference of circle = 2πr

2πr = 12.1 mm

`\sf 2* (22)/(7)*r= 12.1\\\\`

`\sf r = (12.1*7)/(2*22)\\\\`

= 1.925

`\sf \boxed{radius =1.9 \ mm }`