Bell Ringer
• Simply each absolute value
1. 4 − 8
2. 10 − (−5)
3. −2 − 6
1-7 Perimeter, Circumference,
and Area
T
E
R
P E R
I M E T
P
E
R
I
M
E
T
E
R P IE MR EI TME ER T
E R
AREA
E R
P
E
R
I
M
E
T
E
R
CIRCUMFERENCE
s
s
Perimeter P = 4s
Area A = 𝒔𝟐
SQUARE WITH SIDE
LENGHTS S
s
s
b
Perimeter P = 2b + 2h
h
Area A = b ● h
Rectangle with base b and height h
b
h
Circle with
radius r and
diameter d
d
r
Circumference C =
𝝅𝒅 𝒐𝒓 𝑪 = 𝟐𝝅𝒓
Area A = 𝝅𝒓𝟐
Examples!
1. Your pool is 15 ft wide and 20 ft long with a 3 ft wide
deck surrounding it. You want to put a fence around the
deck. How much fence will you need?
2. Find the circumference
12 in.
3. Find the perimeter of A ABC
C
A
B
4. You are designing a rectangular banner for the
front of the school. The banner will be 4 ft wide
and 7 yards high. How much material do you
need?
5. The diameter of a circle is 10 in. Find the area in
terms of 𝝅
10 in
6. Find the area
6 cm
2 cm
CHALLENGE!! Find the area!
Practice!
Pg 55- 1-5, 8-11, 16-17, 20-25, and
27-32