Question

Can someone help please

Answer 1

ANSWER

$3 \: radians$

EXPLANATION

The formula for the calculating the length of an arc is

$l = r \theta$

where theta is in radians.

From the diagram

$l = 12cm$

$r = 4cm$

We substitute the values to obtain;

$4\theta = 12$

Divide both sides by 4 to get;

$\theta = \frac{12}{4}$

$\theta = 3 \: radians$