Module 9: Creating Triangles from Angle Measures

​Use a protractor and a pencil. Fold paper in half.

Once you create your angle of 70°, draw a straight line connecting your 2 rays.

Measure the 3 inside angles of the triangle.

What do they measure up to?

​?

​?

​Name:

Date:

Period:

​Using the same paper...

Try to draw 2 triangles:

The first has the angle measurements of 30°, 70°, 110°

The second has the angle measurements of 45°, 50°, 60°

Discussion:

Were you able to make triangles?

Describe what happened.

​On the back side of your paper...

Tony and Kara are making quilts. They are cutting triangle shapes for their quilt. The triangles have angle measures of 45°, 45°, and 90°. The pattern for the triangles Kara is using is shown.

​Try to draw two 45°, 45°, 90° triangles that are 2 different sizes. One bigger or smaller than the first.

​As you can see, it is possible to make triangles of different sizes even if they have the same angle measurements.

​​Smaller Triangle

​This is called SCALING. Remember that scaling is making something bigger or smaller with the same proportions or the same shape.

Larger Triangle

​In the last spot on the back of your paper...

Draw a triangle with the measures of 60°, 60°, 60°