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

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)

• Yes, There is more than one point R.
• No, There is only one point R.
• Yes, there are infinitely many of point R.

Tags

8.G.1.c

7.G.5

8.G.1.a

8.G.1.b

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?

Tags

8.G.1.c

7.G.5

8.G.1.a

8.G.1.b

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?

Tags

8.G.1.c

7.G.5

8.G.1.a

8.G.1.b

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?

Tags

8.G.1.c

7.G.5

8.G.1.a

8.G.1.b

The point (-4,1) is rotated 180 degrees counterclockwise using center (0,0). What are the coordinates of the image?

• (-1,-4)
• (-1,4)
• (4,1)
• (4,-1)

Tags

8.G.1.c

7.G.5

8.G.1.a

8.G.1.b