This video uses a real world scenario to as we talk about the area and circumference of circles. We will begin to solve the problem: Is my sister's room bigger than mine?

Originally released by Apperson, 2013. Streaming video file encoded with permission for digital streaming by Infobase on April 30, 2015.

What We Know vs. What We Need to Know (4:20); --Determine the Circumference of a Room (10:13); -- Determining the Area of a Room (9:21); -- Determining Area and Circumference With only one Measurement? (3:26); -- Determining Which Room is Bigger (4:51); -- Solving the Big Question (5:02); .