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## Math Week of Jan 5th

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Title: Math Week of Jan 5th

1
Math Week of Jan 5th
-geometry/A/1/scale-map-distance-example

2
Monday Bell Work show your work
• A statue, honoring Ray Hnatyshyn (19342002), can
be found on Spadina Crescent East, near the
University Bridge in Saskatoon. Use the
information below to determine the unknown height
of the statue.

3
Agenda
• 1- bell work
• 2- Agenda- ws
• 3- Vocabulary
• 4- Objective
• 5- lesson Scale Factor
• 6- exit ticket

4
1. Multiplicative Inverse
This word actually means.. of two numbers whose
product is one aka as the reciprocal.
What does this word mean to you?
Explain how you would use this word in math.
Examples
5
Lesson
• 7.G.1 Solve problems involving scale drawings of
geometric figures, including computing actual
lengths and areas from scale drawing at a
different scale.

6
Scale Factor
7
• Scale factor video

8
Identifying Scale Factor
• Model
• Actual
• reduce (simplify) and that is your scale factor
• Try p. 258 s 1-2, 5-6

9
Using Scale Factor
• Example
• A picture was taken of a painting. The picture is
5 cm wide by 8 cm tall. What is the actual size
of the painting if the scale factor is 1/3?

10
Using Scale Factor
• Example
• A picture was taken of a painting. The picture is
5 cm wide by 8 cm tall. What is the actual size
of the painting if the scale factor is 1/3?
• To Solve create 2 proportions (one for width and
one for height)
• Model 5 1 8 1
• Actual x 3 x 3

11
• Now try p. 258
• s 3, 4, 7

12
• Now lets do workbook page 43 together

13
Exit Ticket
• Partner Discussion
• When would you use scale factor in real life?

14
Tuesday Bell Work show your workhave homework
on desk
• Triangles EFG and QRS are similar. The length of
the sides of EFG are 144, 128, and 112. The
length of the smallest side of QRS is 280, what
is the length of the longest side of QRS? (draw a
diagram and solve)

15
Agenda
• 1- bell work
• 2- Agenda- ws
• 3- Vocabulary
• 4- Objective
• 5- lesson Scale Factor
• 6- exit ticket

16
2. Interest
This word actually means.. the amount of money
charged for borrowing or using money or the
money earned by saving money.
What does this word mean to you?
Explain how you would use this word in math.
Examples
17
Lesson
• 7.G.1 Solve problems involving scale drawings of
geometric figures, including computing actual
lengths and areas from scale drawing at a
different scale.

18
Scale Factor
• Check homework

19
Lesson
• Complete the worksheet

20
Exit Ticket
• Partner Discussion
• Scale factor relates to similar figures and
indirect measurement. How????

21
Wednesday Bell Work show your work
• A girl 160 cm tall, stands 360 cm from a lamp
post at night. Her shadow from the light is 90 cm
long. How high is the lamp post?

160 cm
90 cm 360 cm
22
Agenda
• 1- bell work
• 2- Agenda- ws
• 3- Vocabulary
• 4- Objective
• 5- lesson Map Scale
• 6- exit ticket

23
3. Gratuity
This word actually means.. a tip given to a
waiter, taxicab driver, etc.
What does this word mean to you?
Explain how you would use this word in math.
Examples
24
Lesson
• 0706.1.4 use scales to read maps

25
Lesson
• Map Scale Video

26
Map Scale
• Now look at p. 259 15-17

27
Map Scale
• Complete the map scale worksheet

28
Exit Ticket
• Partner Discussion
• When would I be important to use map scale?

29
Thursday Bell Work show work
• A tree with a height of 4m casts a shadow 15 m
long on the ground. How high is another tree that
casts a shadow which is 20 m long? (draw a
diagram and solve)

30
Agenda
• 1- bell work
• 2- Agenda
• 3- Vocabulary
• 4- Objective
• 5- lesson N2K and review
• 6- exit ticket

31
4. Commission
This word actually means.. a fee paid to an
agent or employee for transacting a piece of
business or performing a service especially   a
percentage of the money received from a total
paid to the agent responsible for the business.
What does this word mean to you?
Explain how you would use this word in math.
Examples
32
Lesson
• 7.G.1 Solve problems involving scale drawings of
geometric figures, including computing actual
lengths and areas from scale drawing at a
different scale.
• 0706.1.4 use scales to read maps

33
N2K
• CT-use percent of increase/decrease to determine
• CR- fill in all the blanks to complete the problem

34
Exit Ticket
• Partner Discussion
• What skills were needed for the N2K?

35
Friday Bell Work show work
• Triangles IJK and TUV are similar. The length of
the sides of IJK are 40, 50, and 24. The length
of the longest side of TUV is 275, what is the
perimeter of TUV? (draw a diagram and solve)

36
Agenda
• 1- bell work
• 2- Agenda
• 3- Vocabulary
• 4- Objective
• 5- lesson Quiz
• 6- exit ticket

37
5. Scale Factor
This word actually means.. the ratio used to
enlarge or reduce similar figures.
What does this word mean to you?
Explain how you would use this word in math.
Examples
38
Lesson
• 7.G.1 Solve problems involving scale drawings of
geometric figures, including computing actual
lengths and areas from scale drawing at a
different scale.
• 0706.1.4 use scales to read maps

39
Lesson
• On your desk have a piece of paper out and
sharpened pencil.
• Answer all questions on the test --- show all
work and units of measure
• When done- read or work on something quietly and
individually

40
Exit Ticket
• Partner Discussion
• What skills did you need for the quiz?