# Circle area formula

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A pennant for 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!

As a review of area and circumference of a circle, my students worked in small groups cutting different sized circles and finding area and circumference of each. They wrote the formulas and worked the problems on the circles. Using their circles, we made this Geome-tree in the hallway by our classroom.

Math-tastic Mary: Circumference and Area of Circles #etlobestimages #etlobest

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Graphic Organizers from a Learning-Focused Classroom

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Simple anchor chart for reference to circle formulas. Formulas include: Area of a circle Circumference (using both diameter and radius) Radius *Abb...

Deriving a Formula for the Area of a Circle - never thought to use colored paper - it shows it better

f(t): Formulas? What Formulas? Teaching Distance, Slope, and Midpoint