Question

Find the area of this circle. Use 3 for 7.A = ar2=12 cm[?] cm2

Answer 1

• Diameter,: a straight line passing from one side of the circumference, through the center, and to the opposite side.

,

• Radius,: distance from the center of the circle to the circumference.

Procedure

$A=\pi r^2$

As the diameter (d) is from one side to the other, then the radius is:

$r=\frac{d}{2}$$r=\frac{12}{2}$$r=6$

Then, replacing the latter in the formula and considering that π = 3 :

$A=3\cdot6^2$$A=3\cdot36$$A=108$

Answer: 108 cm^2