AnswersPre-Algebra - MA3119 BRotations in the Coordinate Plane

Rotations in the Coordinate Plane Answers

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1
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Iliana rotated trapezoid WXYZ 180° about the origin. What is the correct set of image points for trapezoid W’X’Y’Z’?

Question illustration
A
W’(4, –2), X’(3, –4), Y’(1, –4), Z’(0, –2)
B
W’(4, 2), X’(3, 4), Y’(1, 4), Z’(0, 2)
C
W’(–2, –4), X’(–4, –3), Y’(–4, –1), Z’(–2, 0)
D
W’(2, 4), X’(4, 3), Y’(4, 1), Z’(2, 0)
2
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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
5

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)
6

Andrew’s rotation maps point M(9, –1) to M’(–9, 1). Which describes the rotation?

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

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