Today we will begin class with a warm-up to review percent applications. What would make a good China Alive Snack Mix?

We will begin some geometry work today. We will review area, perimeter and circumference for rectangles, circles, parallelograms, triangles, and trapezoids. Please pull out the formula sheet from the outbox for this work. It will be very handy!

In our first activity we will review the properties of circles and understand how the formula for the area of a circle is derived. Important terms to know and understand are:

**Perimeter:** the distance around a geometric figure. For a circle this is referred to as the circumference.

**Area: ** the area of a figure is the number of square units needed to cover the figure. Area is measured in units of length squared, or square units.

**Diameter: ** the distance across a circle

**Radius:** the distance from the center of a circle to the side

**Your assignment** is to complete “Discovering the Properties of Circles”. Please also have “Geometry – Review of Area, Perimeter, and Circumference” completed. You should complete the assignment with the following:

- name the shape
- show the formula and substitution for area
- show the formula and substitution for perimeter