More geometry help!
what have you done ? the nine ?
9 10 11 12
okay i m french, so TRS means the angle ? ( i ve not the same notation :) )
okay i think so, so : i don't think you can prove the formula, so you must have been told that a circle has a 2*pi*R circumference right ?
yees
9) is the circumference of all the circle ?
no the circumfrence of r
but it's a point ??
sorry but if you dont know its fine!
no, that's not it :) a point can't have a circumference :/
it's a term for surface
because after that they ask you the area, and with the data you have R must be the circle which center is R
okay so whats the anwser or how do you do this?
the answer is : for an angle of 126° you've 12 pi the angle of the circle is 360 so you've :
(it's 40 pi) because if for 126 you've 14 pi, then for 360 you've 360 *14/126 pi
do you know this rules, or ?
im confused sorry and what number
for the 9 it's 40 pi. I've to think a little in order to explain it :)
im confused sorry and what number
okay thanks a lot :0
that's ok ;p So, we have an area of 35 pi for the 126°, so which area can we have with a 360 angle ?
um
the easier reasoning is : what do i have for 1 ° ?
i have 35 pi / 126 because for 126 ° i have 35 pi
so now, how many do i have with 360 ?
um i dont know im sorry
if you know for 1 ° the area, you can sum all of the area ang get whichever area you want
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