2/29 Lesson 9.2.2 Cross Sections of 3-D shapes

1.  Warm-up:  A box of Mr. Rob's Super Duper Donut Holes has a volume of 48 in³.  

a)  What is one possible set of dimensions of the box?  What is the surface area of the box?

**Bonus question:  What is the minimum surface area, i.e. uses least amount of cardboard, that still satisfies the volume requirement of 48 in³? 

2.  Lesson 9.2.2 Cross Sections of 3-D shapes

• Objective:  I will experiment with creating cross-sections of rectangular prisms and rectangular pyramids.
• Problems 61 and 62 with your same partner from Friday.
• Take turns cutting cross-sections in your 3-D shapes
• Cross-sections are the INSIDE face of the shape that has been cut
• Trace the resulting cross-section on your paper
• Switch roles.  The next partner will re-make the prism and then create another cross-section
• The GOAL is to make as many different types of cross-sections as possible (triangle, square, rectangle, trapezoid, etc.)

Homework:  BuzzMath: Cross-sections of 3-D shapes (link in GC)

      All data collection for Statistics project should be brought to class tomorrow

2/26 Lesson 9.2.1 Surface Area and Volume

1.  Partner Picking Cards:

• Rules:
• Take the card that you are dealt.  Please, no switching
• Sit at a table with your partner.  Please sit next to your partner (shoulder partners)
• No table will have all of one gender

2.  Warm-up (in classwork section)

Copy down the list of vocabulary words.  Leave at least 2 lines of space in between each word

• Rectangular prism
• Face
• Surface area
• Volume

3.  Lesson 9.2.1 Surface Area and Volume

• Objective:  I will calculate the surface area and volume of rectangular prisms and other composite 3-dimensional shapes.
• As you work on Problem 51 (page 504) with your partner, write a definition of each of the vocabulary words in your own words.
• Solve Problems 52 and 53 with your partner

4.  Learning Log (Problem 54) can be done in classwork, but individually

2/25 Lesson 9.1.3 Area of Composite Shapes

1.  Warm-up:  Mr. Rob's donut shop is open for business!  His famous chocolate glazed donuts are flying off the shelves and he needs your help.  For the purpose of ordering supplies, he wants to know how much chocolate glaze he uses on each donut.  Each chocolate glazed donut is 4 inches in diameter, with an interior hole of 1 inch diameter (see picture on side whiteboard).  The glaze goes on top of the donut only.  He needs to know the area of the donut the glaze will cover.

2.  Lesson 9.1.3: Area of Composite Shapes

• Objective:  I will find the area of composite shapes (two or more shapes put together)
• Do Problems #42-44 in teams (page 501).  You may use a resource page for problems 42 and 44.
• Check your answers on the whiteboard

3.  BuzzMath: Area of Combine Figures (link in GC)

Homework:  Lesson 9.1.3 R/P

2/24 Area of a Circle

1.  Warm-up:  The Triangle Inequality Theorem states that a triangle can be made only if the longest side is less than the sum of the short and middle sides.

a)  Is it possible to make a triangle with side lengths 5, 14, 10?

b) Is it possible to make a triangle with side lengths 19, 8, 10?

c)  Is it possible to make a triangle with side lengths 130, 20, 110?

d)  If the side lengths of a triangle are 7 and 12, what are the possible lengths of the 3rd side?  Hint:  Use inequality symbols (<, >) to represent all of the possibilities.

2.  Area of a Circle

• Objective:  I will calculate the area of a circle given the radius or diameter.
• Math Notes: Area of a circle
• BuzzMath: Area of a Circle -  link posted in GC
• Challenge Problem:
• If you know the Circumference of a circle, can you find the area?
• Write down your steps in numerical order
• Trade papers with another student
• Test their theory with this problem:  C = 31.4 cm
• If their theory produces the correct answer (78.5 cm2) commend them for a job well done!
• If not, give their paper back to them for revision

Homework:  Lesson 9.1.2 R/P #31, 32, 34, 35, 38

2/23 Lesson 9.1.1 Circumference of a Circle & Triangle Inequality Theorem

1.  Warm-up:  Make a list of all the things you know about pi (π).

2.  Walk and Talk

3.  Math Notes: Circumference, Diameter, Radius

4.  BuzzMath: Circumference of a Circle (the link is posted in GC)

5.  Dojo Challenge:  If ALL members of your team complete problem 9-8 (page 491) your team receives dojo points

6.  Triangle Inequality Theorem 

Homework:  Lesson 9.1.1 R/P #10-14