Module 3 Topic A Quiz Review

Point A (3, 6) has been dilated from the origin by a scale factor of r=4.

What are the coordinates of A'?

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Point E (9, 1) has been dilated from the origin by a scale factor of r=5.

What are the coordinates of E'?

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Point B (5, 8) has been dilated from the origin by a scale factor of r=1/2.

What are the coordinates of B'?

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What are the two steps for dilating a point?

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Figure ABCD is dilated by a scale factor of 3.

What are the new coordinates of A'B'C'D'?

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Triangle ABC is dilated by a scale factor of 1/2.

What are the new coordinates of A'B'C''?

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Dilations map lines to segments, rays to angles, and segments to rays.

• True

• False

Dilations map lines to lines to lines, segments to segments, rays to rays, and angles to angles of the same measure.

• True

• False

If you dilate a figure, do the angle measures stay the same?

• Yes

• No

A figure has been dilated from the origin by a scale factor of 1/8. If dilation from the origin maps the dilated image back onto the original figure, what is its scale factor?

• 1/8

• 8

• 9

• 1/2