Question

Can help me complete this problem please :c

Answer 1

Answer:

If an exact answer is requested, I would use 3.5 * pi

Step-by-step explanation:

The area of a sector that has the center angle  as the apex is

Area = theta/360 * pi * r^2

Area = 140/360 * pi * r^2

Area = 7/18 * pi * 3^2

Area = 7/18 * pi * 9

Area = 7/2 * pi

Area = 3.5 * pi

Answer 2

Answer:

$A = \dfrac{7}{2}\pi~cm^2$

Step-by-step explanation:

There is a formula for the area of a sector given the radius and the angle measure.

$A = \dfrac{n}{360^\circ}\pi r$

n = angle measure

r = radius

$A = \dfrac{140^\circ}{360^\circ}\pi \times (3~cm)^2$

$A = \dfrac{14}{36}\pi \times 9~cm^2$

$A = \dfrac{7}{18}\pi \times 9~cm^2$

$A = \dfrac{7}{2}\pi~cm^2$