Lesson objective: Apply understanding that angles are** **measured in reference to two rays that intersect the center point of a circle to a real-life situation.

This lesson provides an opportunity for students to apply their knowledge and understanding of angles to a real life situation. Students are asked to find the angle measurement of one section of the Spinner Mr. Patel designed to determine if he created it accurately.

Key Concept students will use:

- An angle is measured in reference to two rays that intersect the center point of a circle. An angle that turns through 1/360th of a circle is called a one-degree angle.

Skills students will use:

- understand unit fractions (Grade 3, Unit 4)

Students engage in Mathematical Practice 4 (model with mathematics) as they use drawings and write equations to find the measurement of an angle embedded in a circle.

**Key vocabulary: **

- angle
- center
- circle
- degree
- measure
- partition
- point
- ray
- rotation

**Special materials needed:**