SPHERE

SPHERE

- a solid bounded by a closed surface every point of which is equidistant from a fixed point called the center.

Illustration:













Area of a Sphere:

A = 4 πr²

Where:

A = area

π = pi = constant = 3.1416

r = radius

Problem:

1. A spherical shape toy ball has the radius of 4 inches. Find the area of the said toy.

Given:

r = 4 in.

Required: Area:

Solution:

A = 4 πr²

    ^{= 4* π *( 4 in. )2}   

   ^{= 64π  in2} ; final answer