This document discusses perimeter, circumference, and area formulas for basic shapes. It provides the formulas for calculating the perimeter of squares, rectangles, triangles, and circles. It also provides the formulas for calculating the area of squares, rectangles, triangles, and circles. Mnemonic devices are included to help remember the circumference and area formulas for circles. For homework, students are assigned problems 5 through 29 of page 52 involving these formulas.

1. 1.7 Perimeter, Circumference & Area August 22, 2012
Bellwork
1. What is a 8 sided figure called? octagon
2. What are the requirements for a regular polygon?
convex, equilateral, equiangular
3. Is a triangle (sometimes, always, or never) convex? always
4. Draw a pentagon that is equilateral but not equiangular.
x2 + 4
5. Find x: 4
x + x
2
Aug 26­7:03 PM
HW pg. 52 #5­29 odds 1

2. 1.7 Perimeter, Circumference & Area August 22, 2012
1.7 Perimeter, Circumference & Area
Square: P = 4s
A = s2 4
s
3
Rectangle: P = 2l + 2w
A = lw l 7
w
Triangle: P = a + b + c 3 4
a c 2
h
A = 1/2 bh
6
b
Circle: C = d = 2π r
π r
12
A = π r2
d
Twinkle, twinkle little star, Circumference equals 2
πr.
Fuzzy wuzzy was a bear, Area =
πr2
Aug 26­7:05 PM
HW pg. 52 #5­29 odds 2

3. 1.7 Perimeter, Circumference & Area August 22, 2012
Aug 30­7:46 AM
HW pg. 52 #5­29 odds 3

4. 1.7 Perimeter, Circumference & Area August 22, 2012
Aug 30­8:03 AM
HW pg. 52 #5­29 odds 4

5. 1.7 Perimeter, Circumference & Area August 22, 2012
Aug 30­8:04 AM
HW pg. 52 #5­29 odds 5

6. 1.7 Perimeter, Circumference & Area August 22, 2012
Aug 30­8:08 AM
HW pg. 52 #5­29 odds 6

7. 1.7 Perimeter, Circumference & Area August 22, 2012
Aug 30­8:55 AM
HW pg. 52 #5­29 odds 7

8. 1.7 Perimeter, Circumference & Area August 22, 2012
Aug 30­8:09 AM
HW pg. 52 #5­29 odds 8

9. 1.7 Perimeter, Circumference & Area August 22, 2012
HW: pg. 52 #5­29 odds
Aug 30­8:06 AM
HW pg. 52 #5­29 odds 9