standard_description: Know the formulas for the area and circumference of a circle and use them to solve problems; give an informal derivation of the relationship between the circumference and area of a circle.
problem_activity: Sort these shapes (cut out from
Polygons Template
) into groups. You may sort them any way you want and into as many groups as you want. Be prepared to explain how you sorted the shapes.
Sort them another way.


aligns: no