3-W Review of Dilation, Similarity and ratios

Select ALL the true statements about an image after a dilation.

• The image is a different shape than the preimage.

• The image is a different size than the preimage.

• The image has the same angle measures as the preimage.

• The image is similar to the preimage.

• The image has the same side lengths as the preimage.

Tags

CCSS.8.G.A.3

Triangle PQR is the image of triangle JKL after a dilation. Is the dilation an enlargement or a reduction? Explain.

• Enlargement, because the image is larger than the original figure.

• Enlargement, because the image is smaller than the original figure.

• Reduction, because the image is smaller than the original figure.

• Reduction, because the image is larger than the original figure.

Tags

CCSS.8.G.A.3

Rajesh is making pennants in preparation for a school soccer game. He wants the pennants to be similar triangles. Which of these triangles could he use for the pennants?

Tags

CCSS.HSG.SRT.A.2

Are ABC and DEF similar?

Tags

CCSS.HSG.SRT.B.5

Are ABC and LMN similar?

• Yes

• No

Tags

CCSS.HSG.SRT.A.2

Josh bought a pizza with eight slices of pizza for $12. What is the cost of a slice of pizza?

Tags

CCSS.6.RP.A.3B

Tags

CCSS.7.G.A.1

What is Dilation?

• Dilation means to enlarge or reduce a shape

• Dilation means to flip over a line

• Dilation means two figures that look alike

• Dilation means to make a shape smaller

Tags

CCSS.8.G.A.3

A triangle has vertices with coordinates A(2,0), B(3, -1) and C(-2,-5). If the triangle is dilated by a scale factor of 3 with the origin as the center of dilation, what are the coordinates of C'?

Tags

CCSS.8.G.A.3

Are these two figures congruent, similar or neither?

• Congruent

• Neither

• Similar

Tags

CCSS.8.G.A.2

CCSS.HSG.CO.B.6