Lesson 01: Projecting and Scaling | Unit 2: Dilations, Similarity, and Introducing Slope

Multiple Select

Rectangle A measures 12 cm by 3 cm. Rectangle B is a scaled copy of Rectangle A. Select **all** of the measurement pairs that could be the dimensions of Rectangle B.

• 6 cm by 1.5 cm

• 10 cm by 2 cm

• 13 cm by 4 cm

• 18 cm by 4.5 cm

• 80 cm by 20 cm

Multiple Choice

Rectangle A has length 12 units and width 8 units. Rectangle B has length 15 units and width 10 units. Rectangle C has length 30 units and width 15 units. Is Rectangle A a scaled copy of Rectangle B? If so, what is the scale factor?

• No, the scale factor is 1.25.
• Yes, the scale factor is 1.5.
• No, Rectangle A is larger than Rectangle B.
• Yes, the scale factor is 0.8.

Multiple Choice

Rectangle B has length 15 units and width 10 units. Is Rectangle B a scaled copy of Rectangle A with length 12 units and width 8 units? If so, what is the scale factor?

• No, the scale factor is 0.8.
• Yes, the scale factor is 1.25.
• Yes, the scale factor is 1.5.
• No, the scale factor is 2.0.

Open Ended

Rectangle A has length 12 units and width 8 units. Rectangle B has length 15 units and width 10 units. Rectangle C has length 30 units and width 15 units. Explain how you know that Rectangle C is not a scaled copy of Rectangle B.

Multiple Choice

Rectangle A has length 12 units and width 8 units. Rectangle B has length 15 units and width 10 units. Rectangle C has length 30 units and width 15 units. Is Rectangle A a scaled copy of Rectangle C? If so, what is the scale factor?

• Yes, Rectangle A is a scaled copy of Rectangle C with a scale factor of 0.4.
• Yes, Rectangle A is a scaled copy of Rectangle C with a scale factor of 1.5.
• No, Rectangle A is a scaled copy of Rectangle C with a scale factor of 2.5.
• No, Rectangle A is not a scaled copy of Rectangle C.

Draw

Draw a scaled copy of Polygon A with scale factor $$\frac 1 2$$ .

Draw

Draw a scaled copy of Polygon B with scale factor 2.

Draw

Draw a scaled copy of Polygon C with scale factor $$\frac 1 4$$ .

Multiple Choice

Triangle $$ABC$$ is a scaled copy of triangle $$DEF$$ with what scale factor? Triangle $$ABC$$ and triangle $$DEF$$ are scaled copies. Side $$AB$$ measures 12 cm and is the longest side of $$ABC$$ . Side $$DE$$ measures 8 cm and is the longest side of $$DEF$$ .

• 2.0
• 1.5
• 1.25
• 1.75

Multiple Choice

Triangle $$DEF$$ is a scaled copy of triangle $$ABC$$ with what scale factor? Triangle $$ABC$$ and triangle $$DEF$$ are scaled copies. Side $$AB$$ measures 12 cm and is the longest side of $$ABC$$ . Side $$DE$$ measures 8 cm and is the longest side of $$DEF$$ .

• 3/4
• 1/2
• 5/6
• 2/3