Exploring Scaled Copies and Scale Factors

The video tutorial explores the concept of scale copies, emphasizing the importance of maintaining the same shape even when sizes differ. It delves into identifying corresponding parts, analyzing angles, and using measurements to determine if figures are scale copies. The tutorial also explains how to identify scale factors, which indicate how much a shape has changed in size. Through examples, the video demonstrates how to verify scale copies without using numbers and with actual measurements.

What is a key requirement for a shape to be considered a scale copy?

• It must be the same size.

• It must be the same color.

• It must be the same material.

• It must be the same shape.

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CCSS.RI.5.5

CCSS.RI.6.5

CCSS.RI.7.5

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CCSS.RI.9-10.5

Why is it important for railroad signs to be the same shape?

• To save manufacturing costs.

• To make them larger.

• To avoid confusing people at crossings.

• To make them more colorful.

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CCSS.8.G.A.2

CCSS.HSG.CO.B.6

What are corresponding parts in the context of scale copies?

• Parts that are made of the same material.

• Parts that are the same color.

• Parts that are in the same place across multiple images.

• Parts that are the same size.

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CCSS.8.G.A.2

CCSS.HSG.CO.B.6

Which of the following is NOT a corresponding part in the given example?

• The points L, B, and B.

• The X in the original and the X in the copies.

• The R in the original and the R in the copies.

• The color of the signs.

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CCSS.4.G.A.1

How can you determine if two angles are the same in different shapes?

• By comparing their colors.

• By measuring their lengths.

• By using a protractor or tracing over them.

• By checking their material.

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CCSS.8.G.A.3

What indicates that a shape has been stretched and is not a scale copy?

• It has the same curves.

• It has the same size.

• It has the same angles.

• It has been stretched into an oval.

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CCSS.8.G.A.3

Which triangle is NOT a scale copy of the original if it has no right angle?

• Triangle D

• Triangle B

• Triangle C

• Triangle A

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CCSS.7.G.A.1

What is the relationship between the side lengths of a scale copy and the original?

• They must be different.

• They must be the same.

• They must be proportional.

• They must be equal.

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CCSS.7.G.A.1

What does a scale factor of 2 indicate?

• The shape is half the original size.

• The shape is twice the original size.

• The shape is the same size.

• The shape is one-third the original size.

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CCSS.7.G.A.1

How can you confirm that a shape is a scale copy using a scale factor?

• By finding a scale factor and checking if it applies to all side lengths.

• By checking the material.

• By comparing the colors.

• By measuring the angles only.

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CCSS.7.G.A.1