TEKS.MATH.7.5A

All angles in similar figures are congruent.  

• True
• False

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TEKS.MATH.7.5A

sf = 2

• Reduction
• Enlargement

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TEKS.MATH.7.5A

Dilate the figure by a scale factor of 3 with the origin as the center of dilation. What are the coordinates of the image?
A(3,3) B(6,6) C(9,3)

• A'(9,9) B'(18,18) C'(27,9)
• A'(6,6) B'(9,9) C'(12,6)
• A'(0,0) B'(3,3) C'(6,0)
• A'(1,1) B'(2,2) C'(3,1)

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TEKS.MATH.7.5A

Tell whether the two figures are similar. Explain your reasoning.

• Yes, similar because they are the same shape and side lengths are proportional.
• No, not similar because they are the same shape, but side lengths are not proportional.
• Yes, same shape
• No, different sizes

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TEKS.MATH.7.5A

Does the image show a dilation?

• Yes
• No

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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.7.5A

The two right triangles below are similar. What is x, the missing side length in triangle DEF? 

• 3.75
• 9.75
• 10
• 12

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TEKS.MATH.7.5C

TEKS.MATH.7.5A

The pair of figures is similar. Find the missing side.

• x = 12
• x = 3
• x = 40
• x = 4

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TEKS.MATH.7.5C

TEKS.MATH.7.5A

A triangle has vertices with coordinates (2,0), (3, -1) and (-2,-5). If the triangle is dilated by a scale factor of 3 with the origin as the center of dilation, what are the coordinates of the vertices of the image?

• (5,3), (6,2), (1,-2)
• (6,0), (9,-3), (-6,-15)
• (2/3,0), (1,-1/3), (-2/3,-5/3)
• (-1,-3), (0,-4), (-5,-8)

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TEKS.MATH.7.5C

TEKS.MATH.7.5A

Enlargement or reduction?  Find the scale factor!

• It's an enlargement; the scale factor is 1/2.
• It's an enlargement; the scale factor is 2.
• It's a reduction; the scale factor is 1/2.
• It's a reduction; the scale factor is 2.

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TEKS.MATH.9-12.III.B.3

TEKS.MATH.7.5C

TEKS.MATH.7.5A