Reflections, Transformations, Dilations

If a figure is dilated by a scale factor of 1/3, what happens to perimeter?

• 1/3 of the size

• 1/9 the size

• 2/3 the size

• not here

• 2/9

If figure is dilated by a scale factor of 2/5, what happens to the area?

• 2/5

• 4/25

• 4/5

• not here

• 1/5

A figure is dilated so that point C(2, 9) becomes C'(8, 36). what is the rule for this transformation?

• (x, y) --> (1/4x, 1/4y)

• (x, y) --> (4x. 4y)

• (x, y) --> (x + 6, y + 27)

• Not here

• (x, y) --> (x - 6, y - 27)

A figure is dilated so that point C(8, 36) becomes C'(2, 9). what is the rule for this transformation?

• (x, y) --> (1/4x, 1/4y)

• (x, y) --> (4x, 4y)

• (x, y) --> (x - 6, y - 27)

• Not here

• (x, y) --> (x + 6, y + 27)

• A

• B

• C

• D

Which statement is true about the shape ABCD if it was reflected across the y-axis to create shape A’B’C’D’?

• Shape A’B’C’D’ will not preserve congruency to shape ABCD.

• Shape A’B’C’D’ will preserve orientation to shape ABCD.

• Shape A’B’C’D’ will preserve congruency to shape ABCD.

• A

• B

• C

• D

In the figure below, △ ABC ≅△ A'B'C'. Which transformation maps △ ABC onto △ A'B'C'?

• Reflect △ ABC in the x-axis.

• Translate △ ABC 3 units left and 6 units down.

• Reflect △ ABC in the y-axis, then rotate it 90° counterclockwise about the origin.

• Rotate △ ABC 180° counterclockwise about the origin.

A reflection

• Has a central point that stays fixed and everything else moves around that point

• a transformation that changes the size of a figure

• a transformation in which the preimage is flipped across a line

• a function that moves an object a certain distance. The object is not altered in any other way.

Which answers are showing a reflection?

• a and c

• b and c

• c and d

• a and d