Five-Minute Check (over Lesson 13–7)
Main Idea and Vocabulary
Key Concept: Rotation
Example 1: Sketch a Rotation
• I will sketch rotations on a coordinate grid.
• rotation
Sketch a Rotation
Sketch a Rotation
Step 1 Graph the original
triangle.
Step 2 Graph the rotated
image.
B
A
A
A
90°
B
C
B
C
Sketch a Rotation
Answer: The ordered pairs for the new vertices are
A(8, 7), B(5, 9), and C(5, 5).
Which shows the new vertices
of the triangle when it is
rotated 90° counterclockwise
about point B?
A. A(3, 3), B(6, 3), C(6, 5)
B. A(6, 5), B(3, 3), C(6, 3)
1.
2.
3.
4.
D. A(3, 1), B(6, 0), C(6, 3)
0%
0%
D
0%
C
A
0%
B
C. A(5, 5), B(8, 5), C(8, 7)
A
B
C
D
End of the Lesson
Five-Minute Check (over Lesson 13–7)
Image Bank
Math Tool Chest
Identify Angles
(over Lesson 13–7)
Which shows the ordered pairs for the new vertices
after a reflection across the line?
A. (7, 8), (7, 4), (8, 3)
B. (8, 8), (7, 3), (9, 5)
0%
D
C
A
B
0%C 0%
D
B
D. (7, 10), (6, 5), (11, 8)
1.
2.
3.0%
4.
A
C. (6, 7), (6, 5), (6, 7)
(over Lesson 13–7)
Which shows the ordered pairs
for the new vertices after a
reflection across the line?
A. (4, 5), (3, 8), (6, 9), (8, 7)
B. (4, 4), (3, 7), (6, 8), (8, 8)
1.
2.
3.
4.
C. (5, 4), (8, 3), (8, 6), (7, 8)
0%
0%
D
0%
C
A
0%
B
D. (4, 5), (3, 8), (6, 8), (8, 7)
A
B
C
D