Question

For questions 1 – 6, find the area of the circle to the nearest hundredth.

Answer 1

Answer:

(a) $Area = 232.23\ cm^2$

(b) $Area = 52.78\ cm^2$

(c) $Area = 373.06cm^2$

Step-by-step explanation:

The area of a circle:

$Area = \pi r^2$

Where

$\pi = 3.14$

Solving (a):

$r = 8.6cm$

$Area = \pi r^2$

$Area = 3.14 * (8.6cm)^2$

$Area = 3.14 * 73.96cm^2$

$Area = 232.2344cm^2$

$Area = 232.23\ cm^2$ --- Approximated

Solving (b):

$r = 4.1cm$

$Area = \pi r^2$

$Area = 3.14 * (4.1cm)^2$

$Area = 3.14 * 16.81cm^2$

$Area = 52.7834cm^2$

$Area = 52.78\ cm^2$ --- Approximated

Solving (c):

$r = 10.9cm$

$Area = \pi r^2$

$Area = 3.14 * (10.9cm)^2$

$Area = 3.14 * 118.81cm^2$

$Area = 373.0634cm^2$

$Area = 373.06cm^2$ --- Approximated