TEKS.MATH.8.3A

Similar Angles

• Congruent
• Proportional
• Division
• Non-Proportional

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TEKS.MATH.8.3A

TEKS.MATH.8.8D

Image                         Pre-image
A   B   C                    A    B    C  
    8   9   6                    56   63   42 
    2   5   -3                 14   35   -21

What is the scale factor that shows the dilation from the pre-image to the image?

• 1/7
• 7/2
• 7/1
• 7.5

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TEKS.MATH.8.3A

Are the following similar? Why or why not?

• Yes
• No, the corresponding angles are not equal.
• No, the ratios of the corresponding sides are not equal.

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TEKS.MATH.8.3A

TEKS.MATH.7.5A

Similar figures have the same ______ but different ______. 

• measure; shapes
• sizes; shapes
• value; measures
• shape; sizes

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TEKS.MATH.8.3A

TEKS.MATH.7.5A

Does the image show a dilation?

• Yes
• No

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TEKS.MATH.8.3A

TEKS.MATH.7.5A

Two objects that are the same shape but not the same size are _______.

• Congruent
• Vertical
• Similar
• Complementary 

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TEKS.MATH.8.3A

If the scale factor is greater than one, the new figure will be

• a reduction
• an enlargement
• a scale
• not proportional

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TEKS.MATH.8.3A

TEKS.MATH.7.5A

If the scale factor is greater than one, the new figure will be

• a reduction
• an enlargement
• a scale
• not proportional

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TEKS.MATH.8.3A

TEKS.MATH.7.5A

An office supply store sells index cards in two different sizes. The large size is a dilation of the small size. Both sizes are shown. Find the scale factor of the dilation.

• 0.5
• 5
• 3
• ⅓

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TEKS.MATH.8.3A

Find the measure of x:

• 6
• 24
• 33
• 36

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TEKS.MATH.8.3A