Area of Figures and Dilations

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Which proportion can we use to find 'x'?

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Which proportion can be used to find side 'x'?

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Which proportion can be used to find 'x'?

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Which of the following algebraic expression would create an enlargement?

• (x,y) -----> (x+3,y+3)

• (x,y) -----> (-2x,-2y)

• (x,y) -----> (0.75x,0.75y)

• (x,y) -----> (2.3x,2.3y)

A figure is dilated by a scale factor of 4. Which of the following statements about the figure must be true?

• The perimeter and area are both multiplied by 4.

• The perimeter is multiplied by 4 and the area is multiplied by 16.

• The perimeter and area are both divided by 4.

• The perimeter is multiplied by 16 and the area is multiplied by 4.

• (x,y) -----> (0.4x,0.4y)

• (x,y) -----> (x+3,y+1.5)

• (x,y) -----> (2.5x,2.5y)

• (x,y) -----> (x-1.5,y-3)

• Pentagon M'N'P'Q'R is larger than Pentagon MNPQR, because the scale factor is greater than 1.

• Pentagon M'N'P'Q'R is smaller than Pentagon MNPQR, because the scale factor is greater than 1.

• Pentagon M'N'P'Q'R is larger than Pentagon MNPQR, because the scale factor is less than 1.

• Pentagon M'N'P'Q'R is smaller than Pentagon MNPQR, because the scale factor is less than 1.

Which side length corresponds with EF?

• NO

• LM

• OL

• EH

What is the only operation ever used with dilation?

• Addition

• Subtraction

• Multiplication

• Division