Question

Help Needed!

Answer 1

It would be 24, correct?

Answer 2

I think you meant to say \(\Large 24\pi\) right ?

Answer 3

Yes.

Answer 4

Can you help me with 2 more?

What is the area of a regular polygon with a side of 12 in.? Round to the nearest tenth.
There is no picture. And thats what throws me off...

Answer 5

check out this page

http://www.mathopenref.com/polygonregulararea.html

Answer 6

wait..does it say how many sides there are?

Answer 7

No, thats the whole question. Wait, I messed up.. Its said regular pentagon... So it has 5 sides...

Answer 8

ok so you use that formula I posted

S = 12
N = 5

Answer 9

Okay, Can you help me the equation?

Would it be?

A = 12^2 (15) / 4 tan (180/5)

Answer 10

make sure you use parenthesis properly otherwise the calculator will interpret the input incorrectly

( 12^2*5 )/( 4*tan(180/5) )

Answer 11

I dont know what to do for 4*tan

Answer 12

Im bad at cos, sin and tan

Answer 13

what kind of calc do you have?

Answer 14

A computer calculator

Answer 15

ok you are better off using something like wolfram alpha

Answer 16

type ( 12^2*5 )/( 4*tan(180/5) ) into wolfram alpha and make sure to switch over to degree mode

Answer 17

I got 180 cot(36)

Answer 18

look at the decimal approximation

Answer 19

make sure to switch over to degree mode

Answer 20

Which is 23.224395290309489542503415027121981162079179723667011

Answer 21

make sure to switch over to degree mode (click "degrees") up at the top

Answer 22

Would that be my answer? Because thats not one of my choices....

Answer 23

My answer choices:

a. 495.5 in^2
b. 311.8 in^2
c. 247.7 in.^2
d. 124.7 in^2

Answer 24

did you see my last attachment?

Answer 25

Yes. Thats what I got.

Answer 26

look at the decimal approximation portion

Answer 27

after you click degrees

Answer 28

So the answer is C

Answer 29

Am I correct?

Answer 30

correct, the area is roughly 247.7 square inches

Answer 31

what do you have so far

Answer 32

Nothing, I dont understand this question.

Answer 33

what is the ratio of the sides?

Answer 34

What do you mean? How do I find that?

Answer 35

you divide the larger side by the smaller side

reduce the fraction as much as possible

Answer 36

Okay. so 7/5?

Answer 37

no

Answer 38

Wait, sorry. I was looking at another problem. So 26 / 6?

Answer 39

26 / 6 = 4.333

Answer 40

26/6 reduces to what?

Answer 41

13 / 3

Answer 42

Whats the next step, partner... :P

Answer 43

so that is the ratio of the two sides

and that's also the same as the ratio of the perimeters

Answer 44

But there's one more step right?

Answer 45

you mean to convert into decimal form or something?

Answer 46

Theres another step. In my answer choices there are 2 ratios

Answer 47

One of the ratio is on there, but theres another ratio by it...

Answer 48

can you show me what you mean?

Answer 49

a. 13/3 and 169/9
b. 13/3 and 16/9
c. 16/3 and 169/9
d. 16/3 and 16/9

Answer 50

We can cross out C and D so that leaves us with A and B

Answer 51

I see

Answer 52

So what we do is simply square 13/3 to get (13/3)^2 = (13^2)/(3^2) = 169/9

that is the ratio of the larger area to the smaller area

Answer 53

Its 60 cm^2, right?

Answer 54

yep 60

Answer 55

Thank you! You are the best! :)

Answer 56

yw