Bell Ringer 2-8-11
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Bell Ringer 2-8-11 1.Calculate the perimeter of the figure. 2.Calculate the area of the figure. in 3 2 in 5 3 1
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Bell Ringer 2-8-11. Calculate the perimeter of the figure. Calculate the area of the figure. Calculate the perimeter of the figure. 2. Calculate the area of the figure. Quiz 2-8-11. How many cubic inches can the figure hold?. 4 in. 5 in. How many cubic inches can the figure hold?. - PowerPoint PPT Presentation
Transcript of Bell Ringer 2-8-11
Bell Ringer2-8-11
1. Calculate the perimeter of the figure.
2. Calculate the area of the figure.
in3
2
in5
31
1. Calculate the perimeter of the figure.
in3
2
in5
31
2)5
31
3
2( P
15
10
53
52
5
8
5
31
15
24
35
38
2)15
24
15
10( P
1
2
15
34P
15
68P
inP15
84
2. Calculate the area of the figure.
in3
2
in5
31
)5
31)(
3
2(A
5
8
5
31
5
8
3
2A
15
16A
2
15
11 inA
Quiz2-8-11
How many cubic inches can the figure hold?
4 in
5 in
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 circle, so I multiplied pi by the radius squared. I multiplied the area of the base by the height of the cylinder.
How many cubic inches can the figure hold?
The volume is 251.2 cubic inches.
CylinderRadius 4 inHeight 5 inCubic inches
hrV 2)5)(4)(14.3( 2V)5)(16)(14.3(V
32.251 inV )5(24.50V
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
#4-41. 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.
Review QuestionJenna needs one foot square floor tiles
for her bathroom. Her bathroom is 6 feet by 5 feet. The floor tiles come 11 tiles to a box. About how many boxes does she need?a. 2b. 3c. 4d. 5
We will grade with the clicker in a few minutes.
Reach for the StarsTuesday
Jerod correctly answered 18 out of 20 equally weighted questions on his English test and 22 out of 25 equally weighted questions on his History test. Choose the method that can be used to accurately determine the test on which he scored higher.A. Compare the number of questions missed on each
test
B. Convert the ratios to percents and then compare them
C. Add 5 to 20 to make each test have 25 questions, and then compare the number of correct answers on both tests.
D. Multiply 20 by the difference of 22 and 18, multiply 25 by that same difference, and then compare the products
Class Work: Surface Area
You need your notes. Title the notes: Surface area of prisms and pyramids
I will check your work at the end of class.
Surface Area
the sum of the areas of the exposed surfaces
• Perimeter is measured inUnits
• Area is measured in Square units = units2
• Volume is measured in Cubic Units = units3
Surface Area of PrismsCalculate the lateral surface area.Calculate the total surface area.
Front & Back: 2(3) = 6 6(2) = 12 units2
Top & bottom: 1(3) = 3 3(2) = 6 units2
Right & Left: 2(1) = 2 2(2) = 4 units2
The bases are the top and bottom.LateralS = 12+4 = 16 units2
TotalS = 12+6+4 = 22 units2
Surface Area of Prisms
Calculate the surface area.
Front & Back: 2(3) = 6 6(2) = 12 units2
Top & Bottom: 2(3) = 6 6(2) = 12 units2
Right & Left: 2(2) = 4 4(2) = 8 units2
If it just asks for surface area, find the total surface area.
TotalS = 12+12+8=32 units2
Surface Area of PrismsCalculate the surface area of the
prism with the following dimensions: length 4, width 3, and height 5.
Front & Back: 4(5) = 20 units2 20(2) = 40 units2
Top: & bottom 4(3) = 12 units2 12(2) = 24 units2
Right & left: 3(5) = 15 units2 15(2) = 30 units2
TotalS=40+24+30 = 94 units2
Surface Area of Prisms
Front and Back: A=4(3)=12 ft2
Top and Bottom: A=4(2)=8 ft2
Left and Right sides: A=3(2)=6 ft2
TotalS=2(12)+2(8)+2(6)TotalS=24+16+12=52 ft2
4 ft
2 ft
3 ft
Calculate the amount of paper needed to cover the box.
Surface Area of Prisms
A label is being made to go around the chocolate container. How many square feet of paper is needed to make the label?
4 ft
2 ft10 ft3 ft
3.6 ft
Surface Area of Prisms
4 ft
2 ft10 ft3 ft
Bottom ft ( )( )4 1 0 4 0 2
3.6 ft
Fron t ft ( . )( )3 6 1 0 3 6 2
Back ft ( . )( )3 6 1 0 3 6 2
363640 LateralS
2112 ftLateralS
Surface Area of Prisms
Before the container is shipped, it will be completely wrapped in plastic. How many square feet of plastic is needed to wrap the container?
4 ft
2 ft10 ft3 ft
3.6 ft
Surface Area of Prisms
4 ft
2 ft10 ft3 ft
Base ft
4 3
2
1 2
26 2
Bottom ft ( )( )4 1 0 4 0 2
3.6 ft
Fron t ft ( . )( )3 6 1 0 3 6 2
Back ft ( . )( )3 6 1 0 3 6 2
36364066 TotalS
2124 ftTotalS
Surface Area of Pyramids
6 ft
6 ft
8 ft
2
bhA
2242
48
2
)8)(6(ftA
)24(4LateralS
296 ftLateralS
Calculate the lateral surface area of the figure.
Surface Area of Pyramids
6 ft
6 ft
8 ft
Bbh
S )2
(4
)66(96 TotalS
3696 TotalS2132 ftTotalS
Calculate the total surface area of the figure.
AreaOfBaseLateralSTotalS
Class WorkMeasuring Up
Pg. 183: evensCalculate the lateral and total.The top and bottom are the bases for
the rectangular prisms.
Rectangular Prisms: Find area & List:
Front and Back Left and Right Top and Bottom
Triangular Prisms: Find area & List:
Front Back Bottom 2 bases
Pyramid: Find area & List:
Triangle Faces 1 Base
