Lesson: Arc Lengths Mathematics • First Year of Secondary School

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In this lesson, we will learn how to find the arc length and the perimeter of a circular sector and solve problems including real-life situations.

Students will be able to

recognize the formulas for calculating arc length when the measure of the arc is given in degrees or radians,
calculate the length of a sector’s arc,
calculate the perimeter of a sector,
calculate the radius of a sector when given the measure of the arc and the length of the arc (or the perimeter).