Question

A circular mirror has a diameter of 12 inches.what is the area, in square inches, of the mirror.

Answer 1

Answer:  The area of the mirror is 113.14 sq. inches [approx.].

Step-by-step explanation:  Given that a circular can till 375 ft² of land in 15 min.

We are to find the area of the mirror in square inches.

The AREA of a circle with radius 'r' units is given by

$A=\pi r^2.$

The diameter of the circular mirror is 12 inches, so the radius of the mirror will be

$r=\dfrac{12}{2}=6~\textup{inches}.$

Therefore, the area of the circular mirror is

$A=\pi r^2=\frac{22}{7}\times 6^2=\dfrac{22\times 36}{7}=113.14~\textup{sq inches}~\textup{[approx.]}$

Thus, the area of the mirror is 113.14 sq. inches [approx.].

Answer 2

Area of a Circle = (pi)*(radius)*(radius)

radius = (diameter)/2 = 12 / 2 = 6

Area of this Circle = (pi)*(6)*(6) = 36 pi

Answer: 36 pi , 113.04 (if using 3.14 as pi) , or 113.01 (if using actual pi)