Foundational Knowlegde: 2. Knows the formula for area and circumference of a circle. 2. Know the terms: circumference, radius diameter, pi. 2. Knows that pi can be approximated by 3.14 and 22/7. 2. Knows the relationship between the radius and diameter of a circle Learning Target: 3. Is skilled at finding area and circumference of circles Extension: 4. Is skilled at finding the area of complex figures composed of circles or parts of circles.