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Open Up - Grade 8 - Mathematics - Unit 1 - Lesson 9

By Formative Library
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Last updated over 2 years ago
7 Questions
1
1.
Do the following steps.
Draw parallel lines AB and CD.(show your work)
Pick any point E. Rotate AB 90 degrees clockwise around E.(show your work)
Rotate CD 90 degrees clockwise around E.(show your work)
What do you notice?(short answer)
8.G.1.c
7.G.5
8.G.1.a
8.G.1.b
1
2.
Use the diagram to find the measures of each angle.
(Match one answer per angle)
  • 50
  • 60
  • 130
  • 90
  • 140
  • 180
  • Angle ABC
  • Angle EBD
  • Angle ABE
8.G.1.c
7.G.5
8.G.1.a
8.G.1.b
1
3.
Points P and Q are plotted on a line.
Find a point R so that a 180-degree rotation with center R sends P to Q and Q to P.(Show your work)

Is there more than one point R that works for part a?(Multiple Choice)
8.G.1.c
7.G.5
8.G.1.a
8.G.1.b
1
4.
In the picture triangle A1B1C1 is an image of triangle ABC after a rotation. The center of rotation is D.
What is the length of side B1C1?
8.G.1.c
7.G.5
8.G.1.a
8.G.1.b
1
5.
In the picture triangle A1B1C1 is an image of triangle ABC after a rotation. The center of rotation is D.
What is the measure of angle B?
8.G.1.c
7.G.5
8.G.1.a
8.G.1.b
1
6.
In the picture triangle A1B1C1 is an image of triangle ABC after a rotation. The center of rotation is D.
What is the measure of angle C?
8.G.1.c
7.G.5
8.G.1.a
8.G.1.b
1
7.
The point (-4,1) is rotated 180 degrees counterclockwise using center (0,0).

What are the coordinates of the image?
8.G.1.c
7.G.5
8.G.1.a
8.G.1.b
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