Download - Friday, February 24 th
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Friday, February 24th • Please complete warm up
• Take out homework (Cylinder wks)
WARM UP1.
2. What is the surface area of cube with all side lengths of 8 in?
What does r2 mean?
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Test # 4
NEXT THURSDAY
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Einstein’s Of
The Month
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Joke of the Day Why is
there not a lot of honey in Boston?Because
there’s only one “B” in
Boston
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Homework Answers
Think, Pair, Share
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3-2-1 Summary
3 things you learned
2 things you still have questions on
1 thing you like about geometry
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3-D Shape Review
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Question
What are two 3-D shapes that have 6
FACES
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Answer
Cube Rectangular prism
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Question
Is a cylinder a polyhedron?
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Answer
NO
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Question
Is a triangular prism a polyhedron?
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Answer
YES
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Question
Is a Cone a polyhedron?
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Answer
NO
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Question
Is a pyramid a polyhedron?
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Answer
YES
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Question
How many faces?
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Answer
5
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Question
What is the top view of a square pyramid?
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Answer
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Question
How many vertices?
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Answer
4
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Goal for today
Volume and Surface Area
CYLINDERS&
Prisms
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FORMULA SHEET THIS IS WHAT YOU WILL GET FOR:
•Test • Interim•CRCT
Use it and don’t lose it
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Cylinder Review
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Good News
Surface Area for Cylinders using nets
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24 in²
24 in²
36 in²
#1 TRY TOGETHER!
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11.4 in²
9.2 in²9.2 in²
#2 YOU TRY!
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Surface Area Using Formula
#3
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Volume Review
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What is It?!?!
•Volume- The number of cubic units needed to Fill a space
•Volume is measured in cubic units (ex: in3)
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Rectangular Prisms • **To find the volume of a rectangular prism,
multiply the area of the base by the height
V=BhB is the area of the base
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BASERectanglur Prism: When the Base is a rectangle- to find the B, use L x W, then multiply by the height of the prism
Cylinder: When the Base is a circle- to find the B, use A=πr2…then multiply by the height of the cylinder
Cube: is a special type of rectangular prism. We can use the formula V=s3 to find the volume, where s=side length
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Helpful Hint
ALWAYS write the formula, plug in your values, and
carefully multiply. CHECK YOUR UNITS!!!
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Practice Problems
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Questions?!?
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Ticket to Go
•Please put your name on it!•Show your work write on the sheet of paper •Use your formula sheet! •Don’t forget to label your answers! •Hand in the front bin when you are done