Question

PLEASE PLEASE PLEASE PLEASE PLEASE HELP ME

Answer 1

what do you need help with

Answer 2

The question I just posted

Answer 3

i see now do you know how to find the area of a regular octagon

Answer 4

area = length x length

so from here you can work out what the answer might be

Answer 5

I think it's either A or C.

Answer 6

your just guessing

Answer 7

No, wouldn't it be 210 because 35*6=210?

Answer 8

ya you shouldnt guess

Answer 9

I'm not just guessing......

Answer 10

If you increase the length by 6 then the area will increase by 6 squared

Answer 11

So, it is A?

Answer 12

Because 35*6^2=1260

Answer 13

well done

Answer 14

Can you help me with another question?

Answer 15

yep

Answer 16

Is there a specific formula I'm supposed to do to solve this one?

Answer 17

@alekos I got 25.12 for some reason, but that's not an option.

Answer 18

yes there is a specific formula

Area of a circle is pi x r^2 but in this case we only have part of a circle or a fraction of a circle. What do you think that fraction will be?

Answer 19

the fraction would be 1/2 since we have half a circle.

Answer 20

No we don't. Half a circle would be 180 degrees. We have 172 degrees

Answer 21

Ohh, I'm sorry that's right. So 172.

Answer 22

So, how would I calculate it?

Answer 23

and the fraction is 172/?

Answer 24

172/1?

Answer 25

Or 172/4?

Answer 26

No. Whats the number of degrees of a full circle?

Answer 27

360

Answer 28

yes. so the fraction is ?

Answer 29

172/360

Answer 30

beautiful. so this is what you have to multiply by the area of the circle with radius 4

Answer 31

172/360*4

Answer 32

no. whats the area of a circle?

Answer 33

360?

Answer 34

no. thats the number of degrees. Have you been taught the area formula?

Answer 35

We're trying to figure out the area, right? So how would I know the area?

Answer 36

Yes we are. I'm asking you if you know the Area formula of a full circle with radius r

Answer 37

pi*r^2

Answer 38

The answer is 24.

Answer 39

OK. now we're getting somewhere

So the area of the arc (172 deg) = (172/360)*pi*r^2

Answer 40

do you follow?

Answer 41

The answer is 24.