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Scale Figures

Study Slideshow

Here is a figure that looks like the letter A, along with several other figures. Which figures are scaled copies of the original A?

Figures 2 and 4 are scaled copies.

What is the scale factor from rectangle KLMN to OPQR?

0.5 or 1/2

What is the scale factor from rectangle OPQR to KLMN?

Justin has two rectangular photo prints that are scaled copies. The length of the smaller print is 5 inches and the width is 3 inches. The length of the larger print is 15 inches. What is the width of the larger print in inches?

Triangle ABC and triangle DFE are scaled copies. What is the value of y?

Rectangle EFGH is a scaled copy of Rectangle ABCD. What scale factor was used to create EFGH?

2.5 or 2 1/2

What is the scale factor? (The original figure is the smaller triangle.)

1.5 or 1 1/2

What is the scale factor? (The original figure is the larger triangle.)

1/6

What is the scale factor? (The original figure is the smaller triangle.)

Triangle OGD is a scaled copy of Triangle CAT. What scale factor was used to create Triangle OGD?

1/4 or 0.25

If a scaled copy is larger than the original figure, is the scale factor greater than 1, equal to 1, or less than 1?

greater than 1

If a scaled copy is smaller than the original figure, is the scale factor greater than 1, equal to 1, or less than 1?

less than 1

True or False: A scaled copy is always larger than the original figure.

False

True or False: A scaled copy cannot be the same size as the original figure.

False

What do we call the number used to multiply a side length to get the corresponding side in a scaled copy?

scale factor

Kobe is trying to reproduce the drawing on the left, so that every side is enlarged by a scale factor of 2.5. Did Kobe make the scale drawing correctly? Explain why or why not.

Yes