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SIMILAR AND CONGRUENT POLYGONS
LESSON 35
POWER UP G
PAGE 229
CONGRUENT POLYGONS
Corresponding angles which are the same measure and
corresponding sides which are the same length
SIMILAR POLYGONS
Corresponding angles which are the same measure and
corresponding sides which are proportional in length.
SIMILAR POLYGONS
Which two rectangles are similar?
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2
6
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10
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SIDE – SIDE – SIDE TRIANGLE SIMILARITY
If two triangles have proportional corresponding side lengths,
then the triangles are similar.
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4
8
18
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24
ANGLE – ANGLE – ANGLE SIMILARITY
If the angles of one triangle are congruent to the angles of
another triangle, then the triangles are similar and their
corresponding side lengths are proportional.
40⁰
105⁰
35⁰
40⁰
105⁰
35⁰
SCALE FACTOR
Constant factor that relates the ratios of similar polygons.
How many times larger is:
Perimeter = scale factor
Area = scale factor 2
SCALE FACTOR
Find the missing side. What is the scale factor?
x
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