8.1 - Similar Shapes 1
Presentation
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Mathematics
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7th Grade
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Practice Problem
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Medium
+3
Standards-aligned
BIXIA CHEN
Used 48+ times
FREE Resource
11 Slides • 8 Questions
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8.1 - Similar Shapes
LO: SWBAT identify the similar shapes
CCLS: 7.G.1
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Open Ended
OPENING ASSESSMENT: Write down the numbers of the two diagrams that show similar shoes. Explain how you know.
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scale factor - is the ratio between corresponding measurements of an object and a representation of that object
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Multiple Choice
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Multiple Choice
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Multiple Choice
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Multiple Choice
The triangles below are similar. What is the scale factor of triangle ABC to triangle DEF?
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EXPLANATION
The second triangle listed is 3 times as large. If you use the ratios, 27/9 = 3 and 21/7 = 3. The second triangle listed is larger, so the scale factor is larger than 1.
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Multiple Choice
The triangles below are similar. What is the scale factor of triangle DEF to triangle ABC?
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EXPLANATION
This time, the second triangle listed is smaller so the scale factor is smaller than 1. You can use the reciprocal of the answer you got from the previous problem or use the ratios. Make sure to put the smaller number on top if you find the ratios: 9/27 and 7/21 both reduce to 1/3.
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Multiple Choice
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Poll
8.1 - Similar Shapes
LO: SWBAT identify the similar shapes
CCLS: 7.G.1
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