friday, february 24 th

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?

Test # 4

NEXT THURSDAY

Einstein’s Of

The Month

Joke of the Day Why is

there not a lot of honey in Boston?Because

there’s only one “B” in

Boston

Homework Answers

Think, Pair, Share

3-2-1 Summary

3 things you learned

2 things you still have questions on

1 thing you like about geometry

3-D Shape Review

Question

What are two 3-D shapes that have 6

FACES

Answer

Cube Rectangular prism

Question

Is a cylinder a polyhedron?

Answer

NO

Question

Is a triangular prism a polyhedron?

Answer

YES

Question

Is a Cone a polyhedron?

Answer

NO

Question

Is a pyramid a polyhedron?

Answer

YES

Question

How many faces?

Answer

5

Question

What is the top view of a square pyramid?

Answer

Question

How many vertices?

Answer

4

Goal for today

Volume and Surface Area

CYLINDERS&

Prisms

FORMULA SHEET THIS IS WHAT YOU WILL GET FOR:

•Test • Interim•CRCT

Use it and don’t lose it

Cylinder Review

Good News

Surface Area for Cylinders using nets

24 in²

24 in²

36 in²

#1 TRY TOGETHER!

11.4 in²

9.2 in²9.2 in²

#2 YOU TRY!

Surface Area Using Formula

#3

Volume Review

What is It?!?!

•Volume- The number of cubic units needed to Fill a space

•Volume is measured in cubic units (ex: in3)

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

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

Helpful Hint

ALWAYS write the formula, plug in your values, and

carefully multiply. CHECK YOUR UNITS!!!

Practice Problems

Questions?!?

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