Question

find the area of the circle using pi.

Answer 1

Area = \(\large \pi r^2\)

Answer 2

\(\large{A_{circle}=\pi\times r^2}\)

Answer 3

\(r\) = radius of circle

Answer 4

Note: you have diameter in the picture.

Answer 5

take a good look at the given diagram,
does it look like radius or diameter ?

Answer 6

\[A=3.14*4.1^2\]

Answer 7

4.1 is diameter right ?

Answer 8

It says to leave it in terms of \(\pi\)
That means no decimal approximations young lady! :D

Answer 9

you need to take half of it to get radius
r = d/2

Answer 10

d.1 is the half line thingy

Answer 11

4.1

Answer 12

i think, 4.1 is the full line thingy

Answer 13

It is indeed.

Answer 14

d=4.1

Answer 15

cuz, 4.1 is sitting exactly over the line at center, so we need to interpret it as diameter

Answer 16

52.7834 is what i got

Answer 17

Like I said earlier, you need to leave it in terms of pi.

Answer 18

but how do i put that into a calculator

Answer 19

Alright !

A = \(\large \pi r\)^2

A = \(\large \pi (\frac{4.1}{2})\)^2

A = \(\large \pi 2.05^2\)

Answer 20

You only mess with the numbers, and then you essentially tag the pi on the end! :)

Answer 21

how do i get the answer then bc 2.05pi^2 is not a choice

Answer 22

No, \(2.05^2 \pi\)

Answer 23

\(2.05^2=~?\)

Answer 24

Alright !

A = \(\large \pi r\)^2

A = \(\large \pi (\frac{4.1}{2})\)^2

A = \(\large \pi 2.05^2\)

A = \(\large 4.2025 \pi \)

Answer 25

oohhhh i see

Answer 26

you need to relax a bit and get back to math hw :o