Bell Ringer2-2-11

1. Calculate the Perimeter of the figure.

2. Calculate the area of the figure.

7 in

2 in4 in

4 in

1. Calculate the Perimeter of the figure.

7 in

2 in4 in

4 in

2 in3 in

P = 4 + 4 + 7 + 2 + 3 + 2P = 8 + 9 + 5P = 17 + 5P = 22 in

2. Calculate the area of the figure.

7 in

2 in4 in

4 in

2 in3 in

A = (4)(4) + (2)(3)A = 16 + 6A = 22 in2

6 in216 in2

Quiz2-2-11

A cardboard box has the following dimensions: 7.5 ft, 3 ft, 4 ft

How many cubic feet of material will the box hold?

What is the volume?

To calculate the amount of cubic feet, I need to find the volume. The figure is a rectangular prism. To calculate the volume of a rectangular prism, I found the area of the base. The base is a rectangle, so I multiplied the length by the width. I multiplied the area of the base by the height of the prism.

A cardboard box has the following dimensions: 7.5 ft, 3 ft, 4 ft. How many cubic feet of material will the box hold?

The volume is 90 cubic feet.

Rectangular prismLength = 7.5 ftWidth = 3 ftHeight = 4 ftVolume

lwhV )4)(3)(5.7(V)4)(5.22(V

390 ftV

Speed Test1. Get out a dry erase marker.2. You have 1 minute to complete as many problems as you can.3.We will grade in 1 minute.4. Graph your results. Keep the graph in your notebook.5. We will do this every day.

Problem of the Week & Word Problem

#4-31. You have 5 minutes to work on the

problem of the week and word problem.2. The problem of the week must follow

the Read, Think, Solve, Justify format.3. When you are finished, turn them in.4. They are due Friday.

Reach for the StarsWednesday

Mr. Lloyd is building a garden. Due to problems on the land, the garden has an irregular shape. Calculate the amount of fencing needed to enclose the whole garden.

7 ft

A. 30 ftB. 25.5 ftC. 32.5 ftD. 28 ft

8 ft

5 ft

5.5 ft

Review QuestionA cylindrical coffee can has a radius of

4 in and height of 10 in. Calculate the approximate volume of the can.

A.40 in3

B.120 in3

C.250 in3

D.500 in3

Class Work: Changing Dimensions

You need your notes. Title the notes: Changing Dimensions

I will check your work at the end of class.

Changing DimensionsA rectangular prism has a length of 2

ft, width of 3 ft, and height of 4 ft. If the width is doubled, how is the volume affected?

Calculate the original VolumeCalculate the new VolumeCalculate how the volume was affectedDraw a picture, illustrating the situation

A rectangular prism has a length of 2 ft, width of 3 ft, and height of 4 ft. If the width is doubled, how is the volume affected?

Calculate the original Volume

Calculate the new Volume

lwhV )4)(3)(2(V

324 ftV

ftnewWnewW

6)3(2

)4)(6)(2(V

348 ftV

A rectangular prism has a length of 2 ft, width of 3 ft, and height of 4 ft. If the width is doubled, how is the volume affected?

Calculate how the volume was affected

Draw a picture, illustrating the situation

22448

Say NO to Oreos

The new volume is twice the size of the original volume.

Changing DimensionsA cylinder can has a radius of 4 in and

height of 8 inches. If the height is cut in half, how is the volume affected?

Calculate the original VolumeCalculate the new VolumeCalculate how the volume was affectedDraw a picture, illustrating the situation

A cylinder can has a radius of 4 in and height of 8 inches. If the height is cut in half, how is the volume affected?

Calculate the original Volume

Calculate the new Volume

hrV 2)8)(4)(14.3( 2V 392.401 inV

innewHnewH

4)5(.8

)8(24.50V

)4)(4)(14.3( 2V)4(24.50V396.200 inV

A cylinder can has a radius of 4 in and height of 8 inches. If the height is cut in half, how is the volume affected?

Calculate how the volume was affected

Draw a picture, illustrating the situation

5.92.40196.200

Say NO to Oreos

The new volume is half the size of the original volume.

Class WorkWork with a partner to solve the

situations. You will do each problem on a separate piece of paper. You will need to illustrate each situation.

You may use a calculator, but remember to show all your steps.