You should KNOW

1. How to "complete the square" in a quadratic expression.

2. The formulas for the distance between two points and the midpoint of the line segment connecting them.

3. The idea of the coordinate plane.

4. That the __graph of an equation__ in two variables x,y is the set of points in the plane whose coordinates (x,y) satisfy the equation.

You should be ABLE TO

1. Complete the square in a quadratic expression.

2. Find distances between and midpoints of pairs of points.

3. Find an equation for a circle from geometric information e.g. the center and diameter.

4. Find geometric information about a circle from its equation.