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=(d)/(2)`
`r=(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