Lesson: Reflections on a Coordinate Plane

Multiple Choice

Another name for Reflection is...

• flip
• turn
• slide
• dilation

Multiple Choice

What color is the x-axis?

• red
• black
• green
• white

Multiple Choice

What color is the y-axis?

• red
• black
• green
• white

Multiple Choice

If the dotted figure is the image, the original figure was reflected over the ...

• x-axis
• y-axis

Multiple Choice

If the dotted figure is the image, the original figure was reflected over the ...

• x-axis
• y-axis

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Multiple Choice

What do you have to do to the points DEF to get D'E'F'?

• Change the sign of the y-value

• add 3 to the y value

• subtract 2 from the x-value

• Rotate triangle DEF 90 degrees clockwise.

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Multiple Choice

Describe how the transformation affected the x and y-values

• The x-values stayed the same and the y-values changed sign.

• The x-values increase by 2 and the y-values decrease by 1.
• The x-values remain the same and the y-values increase by 5.
• The x-values and the y-values switched places.

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Multiple Choice

What is the verbal description of the transformation PQR to P'Q'R'?

• Translation 3 units up
• Rotation 90 degrees clockwise
• Reflection across the y-axis
• Dilation by a factor of 2

Multiple Choice

What is the rule for the transformation PQR to P'Q'R'?

• (-y,x)

• (y,-x)

• (x,-y)

• (-x,y)

Dropdown

Complete the sentences:
The size of the figure ​

Select answer

The orientation (direction) of the figure ​

Select answer

Multiple Choice

Triangle ABC has the coordinates shown in the table. Miguel is going to reflect the triangle using the rule

(x,y) --> (-x,y)

What is the line of reflection?

• y-axis

• x-a

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Poll

How do you feel about reflections?

• Great! I'm ready for the Quick Check!

• Good, but I need some Independent/

  Partner Practice

• OK, but I need small group with a teacher.

• Not Good! I'll schedule a time to come to tutorials.