1. CIRCLES and POLYGONS

2. Formulas to Remember:
Distance Formula:
Slope Formula:
Midpoint Formula:

3. Parallel and Perpendicular Lines
Parallel Lines- HAVE THE SAME SLOPE
Perpendicular Lines: HAVE OPPOSITE RECIPROCAL SLOPE (form right angles!)
Remember slopes of zero and undefined are always perpendicular!!!

4. Quadrilateral
A four sided polygon.
(a four sided shape!)

5. Parallelogram
A four sided figure with opposite sides parallel.

6. Rectangle
A four sided
figure with all
right angles.
To find area: Length * Width

7. Square
A figure with all sides congruent, and four
right angles.
To find area: Side * Side
( or side2 )

8. Circle Set of points equal distant from the center. To find area:
Circumference is the “perimeter” of the circle
How to find circumference:
Diameter is 2 * radius.