1. Cell phone use is prohibited.
Students:
Today is a red light day.
Cell phone use is prohibited.
This is your warning.

2. Find the dimensions of the following rectangle.x 1)
2) The perimeter is 24. The length is 2 more than its width. Find the dimensions.
P = 36 2x
2x + 2x + x + x = 36 x
6x = 36
x + 2
x + x + x x + 2 = 24
x = 6
4x + 4 = 24
The dimensions are 6 and 12.
4x = 20
x = 5
The dimensions are 7 and 5.

3. 2.04 Finding Perimeter using a Ruler

4. A ruler is a device used to measure lengths.
Centimeters
Inches
Rulers are usually dual calibrated.
Inches on one side.
Centimeters on the other side.

5. We can use a ruler to find the perimeter of a figure by measuring each side and adding their measures together.
10 cm
5.4 cm
10 cm cm cm cm
= cm

6. Find the perimeter. 9.4 cm + 6.5 cm + 5.5 cm + 6.5 cm = 21.4 cm 6.5 cm