TEKS.MATH.8.3A

If your scale factor is less than 1, your new shape will be ______.

• Bigger
• Smaller
• The same size
• Rotated

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TEKS.MATH.8.3A

The ratio of the corresponding sides of two similar triangles is 3:5.  What is the ratio of the perimeters of these triangles?

• 5:3
• 9:25
• 3:5
• 6:10

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TEKS.MATH.8.3A

If a Scale Factor is between 0 and 1, then your figure gets...

• Smaller
•  Bigger
• Does not change

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TEKS.MATH.8.3A

If a Scale Factor if greater than 1, then your figure gets...

• Smaller
• Bigger
• Does not change

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TEKS.MATH.7.5A

TEKS.MATH.8.3A

A fence post that is 2 meters tall casts a shadow 5 meters long.  At the same time a tree casts a shadow 108 meters.  How tall is the tree?

• 33.2 meters
• 332 meters
• 43.2 meters
• 432 meters

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TEKS.MATH.8.3A

What is Dilation?

• Dilation means to enlarge or reduce
• Dilation means to reflect on something
• Dilation means to like something
• Dilation means to make something different by making it smaller

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TEKS.MATH.8.3A

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

• x = 20
• x = 12
• x = 5
• x = 4

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TEKS.MATH.8.3A

Are the triangles similar? If so, what is the scale factor from ΔDEF to ΔABC?

• Yes. 1.5

• Yes. ⅔

• Yes. 2

• No.

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TEKS.MATH.8.3A

Are these triangles similar?

• Yes
• No

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TEKS.MATH.8.3A

Rectangle ABCD has a length of 6 and a height of 5. It is dilated by a scale factor of 3.

What is true about the perimeter of A'B'C'D', the new rectangle?

• The perimeter of A'B'C'D' is the same as the perimeter of ABCD

• The perimeter of A'B'C'D' is the 3 times larger than the perimeter of ABCD

• The perimeter of A'B'C'D' is the 6 times larger than the perimeter of ABCD

• The perimeter of A'B'C'D' is the 9 times larger than the perimeter of ABCD

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TEKS.MATH.8.3A