Logic
What is the y-intercept of the equation: y=-2x -8?
(0,-8)
In coordinate geometry, how do you prove a quadrilateral is a rhombus?
4 distances and a statement
What do the words "if and only if" describe in a theorem?
The theorem is true when read forwards and backwards.
What's the law of cosines?
a2=b2+c2-2bc*Cos(A)