# Circle area formula

In this collaborative activity celebrating Pi Day, students work with the circle formulas to find area, circumference, radius and diameter. Each pennant also includes a Fun Fact that students can read as they complete their circle problems. Once a pennant is complete, it can be hung along a string in your classroom to celebrate Pi Day!

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Pi Day. In this collaborative activity celebrating Pi Day, students work with the circle formulas to find area, circumference, radius and diameter. Each pennant also includes a Fun Fact that students can read as they complete their circle problems. Once a pennant is complete, it can be hung along a string in your classroom to celebrate Pi Day!Some of the circle questions are challenging, such as "Find the circumference of a circle if it's area is 25 square inches".

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