Reflection of Triangles

Author:
Roger Gemberling
Topic:
Quadrilaterals, Reflection, Triangles
In prior activities, you reflected triangles over vertical, horizontal, and slanted lines. Today, you will reflect a triangle over each side of a triangle to create a new shape. The blue points of the original triangle are movable so don't hesitate to move any of those points. To begin, click on Reflection #1. Then draw the shape on your resource page. Use tick marks to label equal sides and equal angles. If you know the special name for this shape, label it. Click on Reflection #1 to hide it, and repeat the same steps for Reflection #2 and Reflection #3. When you finish, click on The Half Square button to hide this triangle. Complete the same steps for the other triangles.

Question 1

Which triangle(s) created a Square when the triangle was reflected over one of it's sides? (click on all of the triangles that worked)

Select all that apply
  • A
  • B
  • C
  • D
  • E
Check my answer (3)

Question 2

Which triangle(s) created an Isosceles Triangle when the given triangle was reflected over one of it's sides? (click on all of the triangles that worked)

Select all that apply
  • A
  • B
  • C
  • D
  • E
Check my answer (3)

Question 3

Which triangle(s) created a Kite when the triangle was reflected over one of it's sides? (click on all of the triangles that worked)

Select all that apply
  • A
  • B
  • C
  • D
  • E
Check my answer (3)

Question 4

Did you get any shapes that you are unfamiliar with? Provide the name of the original triangle and Reflection number(s) when writing about these "unfamiliar" shapes.

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