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Open Up - Grade 8 - Mathematics - Unit 1 - Lesson 9
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Last updated 11 months ago
7 questions
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7.G.5
8.G.1.a
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Question 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)
visibility
View drawing
Question 2
2.
Use the diagram to find the measures of each angle.
(Match one answer per angle)
130
140
60
180
50
90
Angle
ABC
Angle
EBD
Angle
ABE
Question 3
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)
Yes, there are infinitely many of point
R
.
Yes, There is more than one point
R.
No, There is only one point
R.
Question 4
4.
In the picture triangle
A
1
B
1
C
1
is an image of triangle
ABC
after a rotation. The center of rotation is
D
.
What is the length of side
B
1
C
1
?
Question 5
5.
In the picture triangle
A
1
B
1
C
1
is an image of triangle
ABC
after a rotation. The center of rotation is
D
.
What is the measure of angle
B
?
Question 6
6.
In the picture triangle
A
1
B
1
C
1
is an image of triangle
ABC
after a rotation. The center of rotation is
D
.
What is the measure of angle
C
?
Question 7
7.
The point
(-4,1)
is rotated 180 degrees counterclockwise using center
(0,0)
.
What are the coordinates of the image?
(4,-1)
(-1,-4)
(-1,4)
(4,1)
"Source: Open Up Resouces (Download for free at openupresources.org.)"