# Lesson Plan: Area of Circular Segments: Degrees Mathematics

This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to find the area of a circular segment where angles are measured in degrees.

#### Objectives

Students will be able to

• derive and recall that the formula for the area of a circular segment with radius given an angle measure in degrees, , is ,
• calculate the areas of major and minor segments given a radius and the measure of an arc in degrees,
• solve multistep problems to find the areas of segments given, for instance, the area of a sector and the radius of the circle,
• solve word problems that involve calculating areas of circular segments.

#### Prerequisites

Students should already be familiar with

• what is meant by a circular segment,
• calculating areas of sectors,
• calculating the area of a triangle using the formula .

#### Exclusions

Students will not cover

• areas of circular segments where angles are measured in radians.