Lesson 7-1: Translations

The original figure "before" a transformation is performed is called the ​ (a)   , and the result of a transformation (the "after") is called the (b)   .

• pre-image
• image
• congruent
• translation
• rectangle
• triangle

After performing a translation on a figure, the pre-image and image are always CONGRUENT. This means that they are ​ (a)   .

• the same shape and same size
• almost the same
• different shapes
• different sizes

How is triangle ABC being translated to triangle A'B'C'?

• left 8, up 3

• left 4, up 9

• right 8, down 3

• right 4, down 9

How is trapezoid ABCD translated to trapezoid A'B'C'D'?

• ABCD is translated 5 units right and 5 units down.

• ABCD is translated 1 unit right and 5 units down

• ABCD is translated 5 units right and 8 units down.

• ABCD is translated 4 units right and 5 units down.

How is Quadrilateral EFGH translated to E'F'G'H'?

• 2 left, 9 down

• 1 right, 6 down

• 3 left, 6 down

• 1 right, 8 down

If triangle XYZ is translated left 3 units and down 9 units, what would be the coordinates of point X' ?

• (-4, 4)

• (-10, 2)

• (-4, -5)

• (-1, 5)

Determine the coordinates of T' if you translated quadrilateral STUV 3 units right and 6 units up.

• (5, 1)

• (2, -5)

• (-1, 1)

• (8, -2)

When translating left or right on a coordinate plane, what coordinate is affected?

• x-coordinate

• y-coordinate

When translating up or down on a coordinate plane, what coordinate is affected?

• x-coordinate

• y-coordinate

Write the rule for this translation: Slide 2 units right and 3 units up

• (x, y)--->(x+3, y+2)

• (x, y)--->(x+2, y+3)

• (x, y)--->(x-2, y+3)

• (x, y)--->(x-2, y-3)