Transformations, Similarity, Proportions

Which series of transformations were performed in the figure?

• Translation 5 units down, reflection over the y-axis

• Reflection over the x-axis, translation 6 units right

• Rotation 90^o clockwise, reflection over the x-axis

• Rotation 180^o clockwise, reflection over the y-axis

One side of a triangle on the coordinate plane is 4 units long. If it undergoes a dilation about the origin with a scale factor of 2, what will the length be?

• 2
• 4
• 8
• 16

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.

The image shows what type of transformation

• Rotation

• Translation

• Reflection across the x axis

• Reflection across the y axis

Identify the transformation from ABC to A'B'C'.

• Reflection across the x-axis

• Reflection across the y-axis

• 90^o clockwise rotation

• 90^o counterclockwise rotation

Which transformations keep figures congruent?

• translation, reflection, and dilation

• reflection, rotation, and dilation

• dilation, translation, reflection, and rotation

• translation, reflection, and rotation

Which scale factor shrinks a figure?

• k = 0

• k =2

• k= 1/3

• k = 1

Are these triangles similar?

• Yes
• No

What does congruent mean?

• corresponding sides and angles are congruent

• corresponding sides are proportional and corresponding angles are congruent

• same shapes

• neither sides or angles are congruent

What does similar mean?

• corresponding sides are proportional and corresponding angles are congruent

• corresponding sides and angles are congruent

• same shapes

• neither sides or angles are congruent