CIR - Arc Length and Sector Area Lesson

Arc Length and Sector Area

It is likely that you remember finding the circumference and area of a circle in previous math courses. Now, we are going to talk about finding arc length, which is a portion of a circle's circumference, and sector area, which is a portion of a circle's area. Download the Arc Length and Sector Area Investigation Handout by clicking here, and be prepared with the following materials: a round cookie (or any other circular object that you can cut in half), string or ribbon, a ruler, a protractor, paper, pencil, and a calculator. Links to an external site. Once you have these materials, please watch the videos below and follow along with a fun activity!

Now that you have learned all about arc length and sector area, let's try some practice problems!

 

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