3: Measuring Circles Last updated Jan 25, 2020 Save as PDF 2.5.2: Using Water Efficiently 3.1: Circumference of a Circle Page ID34990 Illustrative MathematicsOpenUp Resources ( \newcommand{\kernel}{\mathrm{null}\,}\) 3.1: Circumference of a Circle3.1.1: How Well Can You Measure?3.1.2: Exploring Circles3.1.3: Exploring Circumference3.1.4: Applying Circumference3.1.5: Circumference and Wheels3.2: Area of a Circle3.2.1: Estimating Areas3.2.2: Exploring the Area of a Circle3.2.3: Relating Area to Circumference3.2.4: Applying Area of Circles3.3: Let's Put it to Work3.3.1: Distinguishing Circumference and Area3.3.2: Stained-Glass Windows