Open Up - Grade 7 - Mathematics - Unit 4 - Lesson 1

A rectangle has a height to width ratio of 3 : 4.5. Give two examples of dimensions for rectangles that could be scaled versions of this rectangle.

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One rectangle measures 2 units by 7 units. A second rectangle measures 11 units by 37 units. Are these two figures scaled versions of each other?

• Yes they are scaled verisons.
• No they are scaled verisons.

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One rectangle measures 2 units by 7 units. A second rectangle measures 11 units by 37 units. Ants have 6 legs. Elena and Andre write equations showing the proportional relationship between the number of ants, a, to the number of ant legs L. Elena writes a = 6L and Andre writes L=\frac{1}{6}*aDo you agree with either of the equations?

• Andre
• Elena
• Neither
• I agree with both

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Lin has a scale model of a modern train. The model is created at a scale of 1 to 48.The height of the model train is 102 millimeters. What is the actual height of the train in meters?

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Lin has a scale model of a modern train. The model is created at a scale of 1 to 48.On the scale model, the distance between the wheels on the left and the wheels on the right is 1\frac{1}{4} inches. The state of Wyoming has old railroad tracks that are 4.5 feet apart. Can the modern train travel on those tracks?

• Yes
• No

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