Question

A triangle has sides that measure 7 units, 6 units, and 9.22 units. What is the area of a circle with a circumference that equals the perimeter of the triangle? Use 3.14 for π, and round your answer to the nearest whole number.

22 units2
157 units2
39 units2
70 units2

Answer 1

@kekeman What is the perimeter of the triangle?

To find the perimeter you just have to add up all the sides of the triangle

So what is 7 + 6 + 9.22 = ?

Answer 2

The question tells us that the perimeter of this triangle is the same as the circumference of a circle.

The formula for circumference of a circle is \( 2\pi r\)

The question wants us to find the area of that circle

Once you find the perimeter of the triangle (which is equal to the circumference of the circle), we have to then find the radius of the circle and then we can calculate the area from that

area of circle = \(\pi r^2\)

Answer 3

\(\color{#0cbb34}{\text{Originally Posted by}}\) @AZ
@kekeman What is the perimeter of the triangle?

To find the perimeter you just have to add up all the sides of the triangle

So what is 7 + 6 + 9.22 = ?
\(\color{#0cbb34}{\text{End of Quote}}\)
It is 22.22

Answer 4

Good

So that's also the circumference of the circle and now we need to find the radius of the circle so that we can find the area (which is what the question is asking for)

\( 22.22 = 2 \pi r\)

can you solve for r?

Just divide by \(2 \pi\) on both sides

Answer 5

r = 3.53642283

Answer 6

Is that wrong?

Answer 7

Yeah im not good at math soooo

Answer 8

No, that's correct!!

Now we just have to find the area of the circle

Area = \(\pi r^2\)

So basically, plug in r = 3.54

so pi * 3.54^2 =

Answer 9

Idk

Answer 10

that ^2 just means you're multiplying that number by itself twice

and pi or \(\pi\) is 3.14

so essentially

3.14 * 3.54 * 3.54 = ??

Answer 11

Oh yes oh yes pi is 3.14

Answer 12

what was the warning about

Answer 13

39.349224

Answer 14

Good, good

Now can you round that to the nearest whole number?

Answer 15

oh right the direct answer
sorry

Answer 16

So it would be 39 units2?

Answer 17

yes

Answer 18

You got it!

Answer 19

Good job!
Good job AZ

Answer 20

Thanks yall i wish i could give the best response to both of yall

Answer 21

You're welcome!

Answer 22

why would dizzymustag deserve a medal

Answer 23

he did nothing but spam

Answer 24

Im a girl keke

Answer 25

\(\color{#0cbb34}{\text{Originally Posted by}}\) @snowflake0531
he did nothing but spam
\(\color{#0cbb34}{\text{End of Quote}}\)
*She

Answer 26

I am soo sorry

Answer 27

its ok everybody thinks im a boy from my name

Answer 28

and snowflake i don't even have a medal

Answer 29

noticed

Answer 30

Now you do :)

Answer 31

thx!

Answer 32

Youdo know that hte medal is for 'best answer'
she didn't give the best answer, why should she get a medal

Answer 33

Yww

Answer 34

I'm sorry AZ but you really helped a lot

Answer 35

sadge

Answer 36

\(\color{#0cbb34}{\text{Originally Posted by}}\) @kekeman
I'm sorry AZ but you really helped a lot
\(\color{#0cbb34}{\text{End of Quote}}\)
*sadge

Answer 37

How did AZ get 6 medals?

Answer 38

Lol idk