Need Help with math

[whiteninja]

E.g. a circle would have equation X^2+Y^2=C^2, where C is its radius (a constant). Its centre is the origin.

If the center of the circle isn't the origin then it's: ((X-A)^2)+((Y-B)^2) = C^2; (A, B) is the center of the circle, and C is the radius, as before.

There's also the AX+BY=C (standard line formula), Y=MX+B (slope/y-intercept line formula; M=slope of line (change in Y over change in X) and B is the Y-intercept), and Y=AX^2+BX+C (parabala, or however it's spelled)

Lines with equal slopes are parallel to each other; lines with negative reciprocals are perpendicular.

Vectors have distance and magnitude; the distance is the line distance between two points, the magnitude is the (change in x, change in y) used to get there.

That's all Cartestian plane stuff though.