1. Chapter 1: Tools of Geometry
1-9
Perimeter, Circumference, and Area

2. Perimeter the distance around an object the only weird one: circles
use the circumference formula

3. Area
square:
rectangle:
circle:

4. Postulates
1-9:
if two figures are congruent, then their areas are equal
1-10:
the area of a region is the sum of the areas of its nonoverlapping parts

5. Example 1
Your pool is 15 ft wide and 20 ft long with a 3-ft wide deck surrounding it. You want to build a fence around the deck. How much fencing will you need?
Fence P=
20Ft
3ft
15ft

6. Example 2
Find the circumference of the circle in terms of π. Then find the circumference to the nearest tenth.

7. Example 3
Find the perimeter of triangle ABC. A(-1,-2), B(5,-2), and C(5,6).

8. Example 5
The diameter of a circle is 10 in. Find the area in terms of π.

9. Example 6
What is the area of the figure?

10. Homework!! p
2-16 even, 25, 27, 29 34, 37