11.18.20 - HW#50 - Dilations & Similarity Review Quizizz

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 scale factor that is less than one means

• The pre-image will be enlarged.

• The scale factor should be subtracted from the coordinates.

• The image is larger than the pre-image.

• The pre-image will be reduced.

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'?

• (1,-2)

• (-6,-15)

• (-2/3,-5/3)

• (-5,-8)

Tags

CCSS.8.G.A.3

State the coordinate of the image of point B (-10,-6) after a dilation with a scale factor of 1/2.

• (5,3)

• (20,12)

• (-20,-12)

• (-5,-3)

Tags

CCSS.8.G.A.3

If two figures are similar, the corresponding angles are ______________.

• not the same

• congruent

• proportional

• none of these

Tags

CCSS.8.G.A.2

CCSS.HSG.CO.B.6

If two figures are similar, the corresponding sides are ______________.

• equal
• congruent
• proportional
• none of these

Tags

CCSS.8.G.A.2

CCSS.HSG.CO.B.6

Fill in the blank.

1) ________________ Figures have equal corresponding angles and equal corresponding side lengths.

2) ________________ Figures have equal corresponding angles, but proportional corresponding side lengths.

• 1) Congruent 2) Similar

• 1) Similar 2) Congruent

• 1) Preimage 2) Image

• 1) Image 2) Preimage

Tags

CCSS.8.G.A.2

What is the scale factor from the small shape to the big shape?

• 1/2
• 7/3
• 2
• 10/3

Tags

CCSS.7.G.A.1

Find the scale factor from the Preimage C to the Image A. (Hint: Did it get smaller or bigger?)

• 2

• 1/2

• 3

• 1/3

Tags

CCSS.7.G.A.1

Tell whether the two figures are congruent or similar.

• Congruent, because their corresponding angles and sides are the same.

• Congruent, because their corresponding angles are the same and corresponding sides are proportional.

• Similar, because their corresponding angles are proportional and corresponding sides are the same.

• Similar, because their corresponding angles are the same and corresponding sides are proportional.

• They are not congruent or similar.

Tags

CCSS.8.G.A.2