AnswersFL-1205070-MJ Grade 8 Pre-Algebra BRotations in the Coordinate Plane

Rotations in the Coordinate Plane Answers

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Angie’s rotation maps triangle XYZ to triangle X’Y’Z’. X(3, –6) maps to X’(–3, 6)Y(1, –2) maps to Y’(–1, 2)Z(–1, –5) maps to Z’(1, 5) Which describes the rotation?

A
rotation
Option A
B
clockwise rotation
Option B
C
counterclockwise rotation
Option C
D
clockwise rotation
Option D
2
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Triangle XYZ has vertices X(–1, –3), Y(0, 0), and Z(1, –3). Malik rotated the triangle 90° clockwise about the origin. What is the correct set of image points for triangle X’Y’Z’?

A
X’(3, –1), Y’(0, 0), Z’(3, 1)
B
X’(1, 3), Y’(0, 0), Z’(–1, 3)
C
X’(1, –3),Y’(0, 0), Z’(–1, –3)
D
X’(–3, 1), Y’(0, 0), Z’(–3, –1)
3

Which rotation maps point K(8, –6) to K’(–6, –8)?

A
180° counterclockwise rotation
B
90° clockwise rotation
C
90° counterclockwise rotation
D
180° clockwise rotation
4

Triangle QRS is rotated 180° about the origin.What are the coordinates of point S’?

Question illustration
A
(2, 1)
B
(1, –2)
C
(–1, –2)
D
(2, –1)
5

Point B is the image of point A when point A is rotated about the origin. What is known about point A and B?

Question illustration
A
Point B is the result of a 180° rotation.
B
Point A and B have the same x-coordinate.
C
Point B is the result of a 90° counterclockwise rotation.
D
Point A and point B are the same distance from the origin.
6

Tanya’s rotation maps point K(24, –15) to K’(–15, –24). Which describes the rotation?

A
clockwise rotation
Option A
B
clockwise rotation
Option B
C
rotation
Option C
D
counterclockwise rotation
Option D
7

Missy’s rotation maps point K(17, –12) to K’(12, 17). Which describes the rotation?

A
counterclockwise rotation
Option A
B
counterclockwise rotation
Option B
C
clockwise rotation
Option C
D
rotation
Option D

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