Transformation of Reflection on Coordinate Grid

Does the transformation shown preserve congruence and/or orientation?

• Congruence yes, Orientation yes

• Congruence No, Orientation No

• Congruence No, Orientation yes

• Congruence Yes, Orientation No

Does the transformation shown preserve congruence and/or orientation?

• Congruence yes, Orientation yes

• Congruence No, Orientation No

• Congruence No, Orientation yes

• Congruence Yes, Orientation No

Does the transformation shown preserve congruence and/or orientation?

• Congruence yes, Orientation yes

• Congruence No, Orientation No

• Congruence No, Orientation yes

• Congruence Yes, Orientation No

Which of the following are congruence transformations?

• Rotations

• Translations

• Reflections

• All Three

Reflections keep

• both congruence and orientation

• only congruence

• only orientation

• neither

What happens to a coordinate when it is reflected over the y-axis?

• x and y stay the same

• x stays the same and y changes to its opposite

• x changes to its opposite and y stays the same

• both x and y change to their opposites

Which answer shows a reflection across the x-axis?

• d

• c

• b

• a

∆QRS contains the points: Q(4, 2) R(5, 1) S(3,7). If the triangle is reflected across the y-axis, what will S' be?

• S'(3, 7)

• S'(-3, 7)

• S'(-3, -7)

• S'(3, 7)

∆QRS contains the points: Q(-4, 2) R(5, -1) S(3,-7). If the triangle is reflected across the x-axis, what will R' be?

• R'(3, 7)

• R'(5, -1)

• R'(1, -5)

• R'(5, 1)

What is a reflection?

• When you turn an object around a point.

• When you slide an object form one place to another.

• When you flip or mirror an object across a line.

• When you resize an object.