Question

need help

can anyone help me with regard of circles
i mean the needed formulas in solving for them ...\

im just reviewing for our exam in analytic geometry

please?

Answer 1

Like this? \[\large (x-h)^2 +(y-k)^2 = r^2\]
general formula for a circle, centred at (h, k) with radius r.

Answer 2

\[\large Area = \pi r^2\]
\[\large Circumference = 2 \pi r\]

Answer 3

arc length L, circumference C, theta is angle
\[\large \frac{ \theta }{ 360} = \frac{ L }{ C }\]

Answer 4

yeah yeah tnx

Answer 5

do you know how the normal form of a line works? i mean how to do it?

Answer 6

this would surely help

http://www.schooltutoring.com/help/equation-of-a-line-normal-form/

Answer 7

i want to thank the both of you :) i passed :)