Bell Ringer

1
Bell Ringer

• Solve.
• 1. 5 11
• 3 3
• 14
• x 21

• 2. 3.1x 4.5x 8.4
• 5.6x 8.4
• 5.6 5.6
• x 1.5

2x 3
2x 3
3 2
3 2
.
.
2
Geometry
Perimeter and Area of Polygons
3
Distance of Sides

• Find the missing value, x.

28 in
x 2x x 28 4x 28 4 4 x 7
inches
x
x
2x
Any questions?
4
Perimeter

• Find the perimeter.

Find x x 5 17 5 5 x 12
x 5
x 1
If x 12, then x 1 is 11!
17 in
Use x to find perimeter 17 17 11
11 Perimeter 56 inches
5
Area of Rectangles

• Find the area of the rectangle

Find x 2x 4 12 4 4 2x
16 x 8
2x 4
x 3
12 in
If x 8, then x 3 is 5!
Find the area A L W A 12 5 A 60 in2
6
Word Problems

• It takes Sean 1 hour to paint 25 ft2. How long
  will it take Sean to paint the following wall?

A L W A 20 24 A 480 ft2 Time 480
25 Time 19.2 hours
20 ft
24 ft
7
Word Problem

• Sean charges 50 an hour to paint. If he takes 1
  hour to paint 25 ft2, how much will Sean charge
  to paint the wall below?

A ½ B H A ½530 A 75 ft2 Time 75 25
Time 3 hours
Price 350 Price 150
30 ft
5 ft