Geom7.2.notebook
March 24, 2014
Geometry
Ch.7 Notes Page 31
P31 7­2 Similar Polygons
Apr 8­6:55 AM
Same Shape : Different Sizes
Apr 8­7:07 AM
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Geom7.2.notebook
March 24, 2014
To find the SIMILARITY RATIO take one side and divide it by its corresponding side.
Are the polygons similar? If they are, write a similarity statement, and find the similarity ratio. Apr 11­2:28 PM
To find the SIMILARITY RATIO take one side and divide it by its corresponding side.
Are the polygons similar? If they are, write a similarity statement, and find the similarity ratio. Apr 11­2:28 PM
2
Geom7.2.notebook
March 24, 2014
Apr 10­8:29 AM
Word Problem Examples:
A painting is 24 in. wide by 36 in. long.
The length of a postcard reduction of the painting is 6 in.
How wide is the postcard?
A map has dimensions 9 in. by 15 in.
You want to reduce the map so that it will fit on a 4 in. by 6 in. index card.
What are the dimensions of the largest possible complete map that you can fit on the index card?
Apr 11­2:47 PM
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Geom7.2.notebook
March 24, 2014
In any golden rectangle, the length and width are in the GOLDEN RATIO which is about 1.618 : 1.
Apr 10­8:29 AM
An Artist plans to paint a picture.
He wants the canvas to be a golden rectangle with its longer horizontal sides 30 cm wide.
How high should the canvas be?
A golden rectangle has shorter sides of length 20 cm. Find the length of the longer sides.
Apr 11­2:50 PM
4
Geom7.2.notebook
March 24, 2014
Things in the
Golden Ratio.
statue of Athena
Mar 26­7:54 AM
Mar 26­11:02 AM
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Geom7.2.notebook
March 24, 2014
HW #35
7­1 P368 #1­21 (Odds)
7­2 P375 #1­16,18,21­28
Please put your name and class period at the top of
the homework. Also include the homework number.
Terms:
Similar,
Similarity Ratio,
Golden Rectangle,
Golden Ratio
Apr 14­9:06 AM
Apr 10­8:29 AM
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