Question

Can someone please help me I’ve tried so many ways and still can’t get the answer.

Answer 1

15.22

Explanation:

The equation of the circumference of a circle is 2(pi)r

This is actually because 2pi is angle of the arc that makes up the full circle (radians of course)

so a simple formula is:

arc length in radians X radius

radius = 4 cm

the area that the question wants is the oposite

of the 142 degree section so 360 - 142 = 218

218 degrees * (pi/180) = 3.80482 rad

3.80482 * 4 = 15.21928 cm