6-7 Understand Similar Figures

What will the new coordinates of D(4,6) be after a dilation centered at the origin with a scale factor of 1/2

• D'(2,6)

• D'(4,3)

• D'(-2,-3)

• D'(2,3)

Tags

CCSS.8.G.A.3

Triangle A is the image of triangle B. What is the scale factor of this dilation?

Which of the statements is true about the graphed triangles?

• They are similar, because one can be obtained by dilating the other about the origin with a scale factor of 2.
• They are similar, because one can be obtained by dilating the other about the origin with a scale factor of 1/2.
• They are not similar, because one can be obtained by dilating the other about the origin with a scale factor of 2.
• They are not similar, because one can be obtained by dilating the other about the origin with a scale factor of 1/2.

Tags

CCSS.8.G.A.4

CCSS.HSG.SRT.A.2

The pair of figures is similar. Find the missing side.

• x = 20
• x = 12
• x = 5
• x = 4

Tags

CCSS.HSG.SRT.A.2

What makes congruence transformations (translations, reflections, rotations) different than similarity transformations?

• Congruence transformations have the same shape AND size. Similarity transformations just have the same shape.

• Congruence transformations are cooler

• Congruence transformations have the same shape AND size. Similarity transformations just have the same size.

• They are the same; no differences.

ABCDE ~ RYMNT.

Select three of the following that are correct.

• ∠C ≅ ∠M

• ∠T ≅ ∠E

• ∠Y ≅ ∠B

• ∠A ≅ ∠M

• ∠C ≅ ∠R

Tags

CCSS.HSG.SRT.A.2

ABCDE ~ RYMNT.

Which of the following is/are correct? Choose three that apply.

Quad OBCD is the pre-image and is similar to Quad OHTE because:

• Quad OBCD can be reflected over the x axis and then rotated 90 degrees

• Quad OBCD can be reflected over the x-axis and then dilated about point O by a scale factor of 2.

• Quad OBCD can be reflected over the y-axis and then dilated about point O by a scale factor of 2.

• Quad OBCD can be reflected over the y-axis and then dilated about point O by a scale factor of 1/2.

Tags

CCSS.8.G.A.4

CCSS.HSG.SRT.A.2

ΔOBC ~ ΔOGT because:

• ΔOBC can be dilated by a scale factor of 1/2, and then rotated 90 degrees counterclockwise about point O.

• ΔOBC can be dilated about point G by a scale factor of 1/2, and then reflected over the x- axis

• They aren't similar

• They map to each other with similarity transformations.

Two figures that are the same shape but not the same size are _______.

• Congruent
• Vertical
• Similar
• Complementary