The surface area of a sphere of radius r is S, where = 4 2

.

Express r in terms of s and π.

r=√( s )

4π

Step-by-step explanation:

S= 4πr^2

That is the formula for the surface area of a sphere .

first divide through by 4π and take the square root of both sides

start with a line segment pq that we will copy. mark a point r that will be one endpoint of the new line segment. set the compasses' point on the point p of the line segment to be copied. adjust the compasses' width to the point q. the compasses' width is now equal to the length of the line segment pq.

step-by-step explanation: