Chapter 9 Geometry Review

What rotation describes K(-1,3) -> K’(3,1)?

• 270 rotation
• 90 rotation
• 100 rotation
• 180 rotation

What is the procedure for a 180 rotation ?

• (X,Y) -> (-X,-Y)
• (X,Y) -> (-Y, X)
• (X,Y) -> (-X,-Y)
• (X,Y) -> (Y, -X)

A 90 degree counterclockwise rotation is a ____ clockwise rotation

• 270
• 90
• 180
• 120

Triangle LMN has vertices L(-1,-1), M(0,-4), and N(-6,-2). If this triangle was rotated 180 degrees counterclockwise about the origin what would point L’s image be?

• L’ (1,1)
• L’ (0,-4)
• L’ (-1,-1)
• L’(-1,1)

Ellie enlarged a 4-inch by 6-inch photograph by a factor of 5/2. What are the dimensions of the photograph.

• 10-inch by 15-inch
• 7 inch by 5 inch
• 5 inch by 2 inch
• 5 inch by 3 inch

Trapezoid FGHI has vertices F(7,7), G(9,2),H(3,2), and I(5,7). After a 270 degree rotation what is F’s image?

• (7,-7)
• (9,2)
• (7,7)
• (-7,7)

Using the answer from you last problem, what is the image of A’ after a 90 clockwise rotation?

• A” (4,2)
• A” (2,4)
• A” (-2,4)
• A” (-2, -4)

How do you find the coordinates of an image after dilation?

• Multiply by the scale factor
• Multiply by 2
• Multiply by the reciprocal
• Divide by 1

If Triangle LMN from #1 was rotated 270 degrees CLOCKWISE what would M’s image be?

• (4,0)
• (0,4)
• (-4,0)
• (-0,4)

Find coordinates A(2,2) B(3,4) C(5,2) r=2

• A’(4,4) B’(6,8) C’(10,4)
• A’(3,1) B’(3,4) C’(8,2)
• A’(3,3) B’(1,1) C’(6,4)
• A’(2,2) B’(3,4) C’(5,2)