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what do you need help with
The question I just posted
i see now do you know how to find the area of a regular octagon
area = length x length so from here you can work out what the answer might be
I think it's either A or C.
your just guessing
No, wouldn't it be 210 because 35*6=210?
ya you shouldnt guess
I'm not just guessing......
If you increase the length by 6 then the area will increase by 6 squared
So, it is A?
Can you help me with another question?
Is there a specific formula I'm supposed to do to solve this one?
@alekos I got 25.12 for some reason, but that's not an option.
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?
the fraction would be 1/2 since we have half a circle.
No we don't. Half a circle would be 180 degrees. We have 172 degrees
Ohh, I'm sorry that's right. So 172.
So, how would I calculate it?
and the fraction is 172/?
No. Whats the number of degrees of a full circle?
yes. so the fraction is ?
beautiful. so this is what you have to multiply by the area of the circle with radius 4
no. whats the area of a circle?
no. thats the number of degrees. Have you been taught the area formula?
We're trying to figure out the area, right? So how would I know the area?
Yes we are. I'm asking you if you know the Area formula of a full circle with radius r
The answer is 24.
OK. now we're getting somewhere So the area of the arc (172 deg) = (172/360)*pi*r^2
do you follow?
The answer is 24.