Understand angle concepts and measure angles

Fourth grade goals:

• • Measure angles using a protractor.

  • Sketch angles of specified measure.

  • Solve addition and subtraction problems to find unknown angles on a diagram.

When students enter fourth grade:

• • Students should be able to count the number of angles on a shape.

How we teach it?

• 1. Angle Concepts

  2. Measuring Angles

  3. Drawing Angles

  4. Solving Angles

Vocabulary:

• • degrees

  • vertex

  • acute angle

  • right angle

  • obtuse angle

  • straight angle

  • reflex angle

• protractor

Practice online:

• Alien Angles

• Mission 2010: Angles

• Squirt the Dog

• Banana Hunt (hard!)

• Kung Fu Angles

• Anti-Homework Elementary

• Toon University: Angles