Unit 9 Review

Triangle ABC is translated on a coordinate grid to create A'B'C' as shown on the graph.

Write the vertices for triangle A'B'C' in the blanks below.

Original →New

A(-8,7)→A'(​ (a)   )​

B(2,2)→ B'(​ (b)   )

C(-8,2)→ C'(​ (c)   )

• 0,-1
• 9,-6
• 0,-6
• -6,0
• -1,0
• -6,9
• 9,6
• 06

Triangle ABC is translated on a coordinate grid to create A'B'C' as shown on the graph.

What is the change in the x-coordinate values from the original to the new vertices?

Triangle ABC is translated on a coordinate grid to create A'B'C' as shown on the graph.

What is the change in the y-coordinate values from the original to the new vertices?

Write a verbal description of the translation from each algebraic representation.

(x,y)→(x-3, y-7)

A translation of 3 units ​ (a)   and 7 units ​ (b)   .

• left
• down
• up
• right

Write a verbal description of the translation from each algebraic representation.

(x,y)→(x+5, y+1)

A translation of 5 units ​ (a)   and 1 unit ​ (b)   .

• right
• up
• down
• left

Write a verbal description of the translation from each algebraic representation.

(x,y)→(x-9, y+3)

A translation of 9 units ​ (a)   and 3 units ​ (b)   .

• left
• up
• right
• down

Write an algebraic representation from each verbal description of a translation.

A translation of 8 units right and 1 unit up.

Write an algebraic representation from each verbal description of a translation.

A translation of 7 units left and 4 units down.

Match the transformation with the proper rule.

• (y,-x)

• Reflection

• (x,-y)

• Translation

• (-y, x)

• Dilation

• (x+2, y-6)

• Rotation (270)

• (3x, 3y)

• Rotation (90)

True or False.

If two figures are congruent, then their corresponding side lengths are equal.

• True

• False