S2 8th Grade Review

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

• 90^o clockwise rotation
• 90^o counter clockwise rotation
• Reflection across the y-axis
• Reflection across the x-axis

Which rule shows a reflection over the x-axis?

• (x, y) --> (-x, y)

• (x, y) --> (-x, -y)

• (x, y) --> (x, -y)

• Not here

Which rule shows a reflection over the y-axis?

• (x, y) --> (-x, y)

• (x, y) --> (-x, -y)

• (x, y) --> (x, -y)

• Not here

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

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)

Choose the rule that was used to transform this figure.

• (x, y) --> (x - 5, y + 3)

• (x, y) --> (x + 5, y - 3)

• (x, y) --> (x + 3, y - 5)

• (x, y) --> (x - 3, y + 5)

• Not here

A figured is dilated by a scale factor of 3. What is the change in area?

• 3

• 9

• 6

• not here

What is the rule for this transformation?

• (x, y) --> (x, -y)

• (x, y) --> (-x, y)

• (x, y) --> (x - 2, y + 0)

• Not here

What is the rule for this transformation?

• (x, y) --> (2x, 2y)

• (x, y) --> (1/2x, 1/2y)

• (x, y) --> (-2x, -2y)

• Not here

Which transformation(s) preserve congruency?

(Choose all that apply)

• rotations

• reflections

• translations

• dilations