
Congruence Transformations
Presentation
•
Mathematics
•
9th - 10th Grade
•
Practice Problem
•
Medium
+3
Standards-aligned
Paige LaGrange
Used 63+ times
FREE Resource
11 Slides • 17 Questions
1
Congruence Transformations
Geometry
Mrs. LaGrange
2
Warm up!
Do you remember?
3
Multiple Choice
Use the distance formula
(x2−x1)2+(y2−y1)2 to find the length of AB for A(2,7) and B(7,-5).169
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85
17
4
Multiple Choice
What point is 6 units to the right of (3,5)?
(3, 11)
(9, 11)
(9, 5)
(3, 11)
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Multiple Choice
Are these triangles congruent?
Yes
No
6
Math spoken here.
Vocabulary
Transformation: the change
Preimage: original
Image: new
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Identify Transformations
Reflection: uses a line of reflection to create a mirror image of the original feature.
8
Reflection Reference Guide:
Coordinate notation
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Multiple Choice
Which graph shows the pre-image reflected over y-axis?
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Multiple Choice
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Multiple Choice
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Multiple Choice
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Multiple Choice
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Multiple Choice
Flipping a figure is a ...
Rotation
Reflection
Dilation
Translation
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Rotation about a point
Rotation is the turning or spinning of a figure through a specific angle and direction about a fixed point.
Note: Point A is called the center of rotation or turn center.
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Rotation Quick Reference
Coordinate Plane (In this lesson if a rotation is shown in a coordinate plane the center of rotation is the origin.)
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Rotations: Direction and Angle
The direction of a rotation can be clockwise or counterclockwise. The angle of rotation is formed by rays drawn from the center of rotation through corresponding points on the original figure and its image.
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Multiple Choice
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Multiple Choice
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Multiple Choice
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Multiple Choice
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Translations:
In the coordinate plane, a translation moves an object a given distance right or left and up or down.
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Multiple Choice
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Multiple Choice
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Multiple Choice
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Multiple Choice
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Questions?
Your turn for practice.
Congruence Transformations
Geometry
Mrs. LaGrange
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