The area of a polygon equals
area = circumradius² * number of sides * sin (360 / # of sides) / 2
area = 77² * 20 * sin (360 / 20) / 2
area = 77² * 20 * sin (18) / 2
area = 118,580 * 0.30902 / 2
area = 36,643.59 / 2
area = 18,321.8 square millimeters

3 0

3 years ago

A plastic ball is filled with gel to make a stress ball. If the ball has a radius of 4 cm, how much

Dafna1 [17]

Answer:

267.947 cm^{3} of gel is required to fill the plastic ball.

Step-by-step explanation:

The radius of the ball is given as 4 cm.

The gel is filled in the plastic ball, that means the gel occupies the volume of the radius.

The volume of the sphere is given by the formula,

$V = \frac{4}{3}(\pi)R^{3}$ , the R is the radius of sphere.

$V = \frac{4}{3}(\pi)(4)^{3} = 267.947 cm^{3}$

Thus, the volume of gel required to fill the plastic ball to make it stress ball is

267.947 cm^{3} of gel.

3 0

3 years ago