Question

nina drew a sector of a circle that has a 90 degree central angle and a radius of 4 centimeters. what is the area of the sector of the circle?

Answer 1

so a circle has a full central angle of 360 degrees.

so 90 degrees means one-fourth of the circle's area is to be taken....



so area = (1/4) x pi x r^2

=4pi

12.56 sq. cms.