# Lesson Plan: Central Angles in a Circle Mathematics

This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to identify a central angle in a circle and find its measure using its properties.

#### Objectives

Students will be able to

- understand what a central angle in a circle is,
- find the measure of a central angle given its proportion of the whole angle of the circle,
- find the measure of a central angle given the length of the arc that subtends it and the circumference of the circle,
- find the measure of a central angle contained in a triangle using the total angle sum of the triangle.

#### Prerequisites

Students should already be familiar with

- arcs and arc length,
- number of degrees in a circle.

#### Exclusions

Students will not cover

- circle theorems,
- trigonometry.