71 ­ Scale Factor Day 2.notebook
January 06, 2016
AGENDA
1/4
1/5
Monday
Tuesday
1/8
1/6
1/7
Wednesday
Thursday
New Year
Translation Translation & Scale Scale Trans. Factor Factor
Review
Day 2
Friday
Quiz
Keep HW Out!
You need your INB
and Nov 26­4:11 AM
Warm­Up (p. 28 or 30­ same pages as yesterday)
1) The point A (­3, 0) is moved using the
translation (x+2, y). What are the coordinates of
A'?
2) The point B' is at (5, 8) after a translation of
(x­2, y+1). What are the coordinates of B?
*Hint: which is original point? Which is image? Jan 6­12:09 PM
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71 ­ Scale Factor Day 2.notebook
January 06, 2016
Table of Contents
28 ­29
3
Scale Factor /day 2
Sep 8­3:27 PM
New Year Review: End of Class Procedures
Jan 3­4:11 PM
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71 ­ Scale Factor Day 2.notebook
January 06, 2016
Homework Check
Dec 20­12:07 AM
Classwork
We can also use what we know about scale factor to solve for the
missing side lengths of similar figures.
Watch!
4 in
7 in
12 in
x
5 in
15 in
Scale factor: ________
Side length: ________
1) First identify corresponding sides
2) Use scale factor to see how the corresponding sides relate.
HINT: you start with the figure that you know the sides to and move to the figure that has "x" (the unknown).
Jan 7­10:45 PM
3
71 ­ Scale Factor Day 2.notebook
January 06, 2016
Target: I can use scale factor to find a missing side length.
29
How to identify 1) First identify corresponding sides
the scale 2) Use scale factor to see how the factor:
corresponding sides relate.
Practice:
Glue In
(next slide)
Sep 8­3:27 PM
Glue in Notes
We can also use what we know about scale factor to solve for the
missing side lengths of similar figures.
24 cm
6 cm
x
12 cm
Scale factor: ________
Side length: ________
1) First identify corresponding sides
2) Use scale factor to see how the corresponding sides relate.
HINT: you start with the figure that you know the sides to and move to the figure that has "x" (the unknown).
Jan 7­10:45 PM
4
71 ­ Scale Factor Day 2.notebook
January 06, 2016
Classwork
We can also use what we know about scale factor to solve for the
missing side lengths of similar figures.
1)
5 in
3 in
10 in
6 in
2)
7 cm
4 in
21 cm
x
x
Scale factor: ________
Side length: ________
12 cm
Scale factor: ________
Side length: ________
3) Toys R' Us placed a model of Pokemon toy in the front of its store. The scale used to make the model is 1 inch : 3 feet. The model is 15 feet tall. What is the actual height of the Pokemon toy?
4) The height of a statue of a boy was 8 meters and the scale used was 2 meters : 1 foot. Find his actual height.
Jan 7­10:45 PM
Name ___________
Check-In
Use what you know about scale factor to determine each missing measurement.
1) A model of a dinosaur skeleton was made using a scale of 1 cm : 20 cm in a museum. If the size of the dinosaur's tail in the model is 16 cm, then find its actual length.
2) A lake measured 5 cm wide on a map. How wide will the lake actually measure, if the scale of the map is 1 cm : 8 km? 4)
3)
x
40 mm
23 mm
2 in
5 in
46 mm
20 in
Scale factor: ________
x
Scale factor: ________
Side length: ________
Side length: ________
Complete this ­ turn it in ­ get your HW
Jan 7­10:20 PM
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71 ­ Scale Factor Day 2.notebook
January 06, 2016
Jan 7­4:54 PM
Jan 7­4:58 PM
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71 ­ Scale Factor Day 2.notebook
January 06, 2016
Jan 7­4:59 PM
Jan 7­5:03 PM
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71 ­ Scale Factor Day 2.notebook
January 06, 2016
Jan 7­5:04 PM
Jan 7­5:20 PM
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71 ­ Scale Factor Day 2.notebook
January 06, 2016
Jan 7­5:07 PM
31
Jan 9­8:20 AM
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71 ­ Scale Factor Day 2.notebook
January 06, 2016
Table of Contents
3
1 Cover
3 T.o.C.
5 Parts of a Circle
7 Circumference
9 Finding d & r
2
4
6
8
Parts of a Circle
Circumference
Finding d & r
10 Arc Length 11 Arc Length
12 Area Formulas 13 Area Formulas
14 Area of a Circle 15 Area of a Circle
16 Finding r from A 17 Finding r from A
18 Area of a Sector 19 Area of a Sector
20 Quiz Warm Up 21 Circles Review
22 Transformations 23 Foldable Notes
24 Translations 25 Translations
26 Translations 2 27 Translations 2
29 Reflections Notes
28 Reflections
30 Scale Factor
31 Scale Factor
Dec 30­1:53 PM
Classwork
We can also use what we know about scale factor to solve for the
missing side lengths of similar figures.
1)
3 in
5 in
10 in
6 in
2)
7 cm
4 in
x
12 cm
Scale factor: ________
Scale factor: ________
Side length: ________
Side length: ________
40 mm
4)
3)
x
20 in
Scale factor: ________
Side length: ________
21 cm
x
23 mm
2 in
5 in
46 mm
x
Scale factor: ________
Side length: ________
Jan 7­10:45 PM
10
71 ­ Scale Factor Day 2.notebook
January 06, 2016
Scale Check!
Use what you know about scale factor to determine each missing measurement.
1) A model of a dinosaur skeleton was made using a scale of 1 cm : 20 cm in a museum. If the size of the dinosaur's tail in the model is 16 cm, then find its actual length.
2) A lake measured 5 cm wide on a map. How wide will the lake actually measure, if the scale of the map is 1 cm : 8 km? 3) Toys R' Us placed a model of Pokemon toy in the front of its store. The scale used to make the model is 1 inch : 3 feet. The model is 15 feet tall. What is the actual height of the Pokemon toy?
4) The height of a statue of a boy was 8 meters and the scale used was 2 meters : 1 foot. Find his actual height.
Complete this ­ turn it in ­ get your HW
Jan 7­10:20 PM
11