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What's Your Angle?

Devise procedures for using a protractor to measure the number of degrees in an angle, and use inductive reasoning to develop "angle sense." Describe circumstances and careers that require a working knowledge of angles and their measurements. Students make estimates of various angles. They also use inductive reasoning skills to construct their own method for effectively using the protractor to measure angles.

Weblink address (URL):

What's Your Angle?

Standards & Objectives

Learning objectives:

Objective

Using inductive reasoning, students will devise procedures for using a protractor to measure the number of degrees in an angle.

Lesson Variations

Blooms taxonomy level:

Understanding

Differentiation suggestions:

Extensions & Connections

Give students graph paper and have them draw a rectangle. Have them draw the two diagonals. Label the two triangles formed, and measure the angles of each triangle with a protractor. Have students look for patterns.
Have students draw any two straight lines that intersect. Measure the four angles formed. Have them write their observations.

Helpful Hints

Materials

Each Group:

Angle wheel
Hinged Mirror
Protractor
Angle Measurement Activity Sheet

Teacher:

Large demonstration angle wheel

References

Contributors:

Originator:

Ayers Institute for Learning & Innovation

eduToolbox® is a resource-sharing portal developed by the Ayers Institute for Learning & Innovation with collaborative support and funding from the Tennessee Department of Education and the U.S. Department of Education's Math & Science Partnership program.