Radius Squares

Students estimate and use repeated reasoning (MP8) to make sense of the relationship between the radius of a circle, the square of the radius, and the area of the circle. Note: This lesson is designed for 90 minutes and may take multiple class periods to complete.

By Desmos Classroom

Learning goals: Learning Goals • Describe the relationship between the radius of any circle and its area as the square of the radius times `\pi`. • Estimate and calculate the area of a circle. Materials • Scissors • Graph paper (optional)