Reflection: Connection to Prior Knowledge Congruent Triangles Based on Rigid Motions - Section 2: Mini-Lesson


I was pleased my students were applying the Pythagorean Theorem to prove a triangle and its reflection over the y-axis were congruent. In my class we hadn't explicitly used the Pythagorean Theorem which means they were able to connect what they had learned in previous classes to this lesson. Applying the Pythagorean Theorem helped students see that two triangles are congruent to each other if all three of the sides in the pre-image are congruent to the corresponding sides in the image. 

  Connection to Prior Knowledge: Congruent Triangles Based on Rigid Motions Mini-Lesson Reflection
Loading resource...

Congruent Triangles Based on Rigid Motions

Unit 4: Rigid Motions
Lesson 2 of 3

Objective: SWBAT Use rigid motions to decide if two triangles are congruent.

Big Idea: Students will examine triangles on the coordinate plane and use rigid motions to show two triangles are congruent.

  Print Lesson
12 teachers like this lesson
triangle congruence based on rigid motion image
Similar Lessons
Triangle Construction Site
Geometry » Triangles and Congruence
Big Idea: Students use an online simulation to build triangles from sets of parts and discover minimum conditions for proving triangles congruent.
Ault, CO
Environment: Rural
Tom Chandler
Dilation Nation
Geometry » Transformers and Transformations
Big Idea: Students will review transformations using a brain pop and learn how to geometrically enlarge and shrink shapes.
Saratoga Springs, NY
Environment: Suburban
Stephanie Conklin
Rotations in the Coordinate Plane
8th Grade Math » Transformations
Big Idea: Transition students from using tracing paper to perform rotations into using coordinates and realizing the pattern of rotating in multiples of 90 degrees about the origin.
Bowling Green, KY
Environment: Suburban
Christa  Lemily
Something went wrong. See details for more info
Nothing to upload