Question

What is the area of the given circle in terms of pi?

A.16.2pi m^2
B.10.89pi m^2
C.21.78pi m^2
D.43.56pi m^2

I keep doing 6.6/ 1/2=3.3 then I do Area=3.14*3.3*3.3=34.1946????? I'm so confused? What am I not doing right?

Answer 1

It will be option B.

Explanation:

area=π*r^2

r=radius

2r=d -> d/2=r

we are given d, the diameter

we need r

so

d/2=6.6/2=3.3=r

therefore

area=π*r^2

area=π*(3.3)^2

area=π*10.89

area=10.89π square units

Answer 2

The equation for area of a circle is area = pi×r^2

Your were correct to multiply 6.6 by 1/2 (or divide 6.6 by 2) to get 3.3, but they didn't want you to actually use pi to solve... they wanted you to solve in terms of pi which means just take 3.3^2 which = 10.89 and multiply by pi...

10.89pi m^2

Answer B