Engaging, hands-on activity for students to explore the area of a circle. Students will draw circles, use rulers to divide a circle into sectors, cut out sectors, arrange parts of a circle so that they form a familiar shape, and find the area of the familiar shape.
Includes a page that can be used as an assessment.
This PDF provides step by step instructions and scaffolding to allow students to understand how the formula for the area of a circle can be derived from the area of a parallelogram. Could be projected to the class.
Informal Derivation of the Relationship Between The Circumference and Area of a Circle
MAFS.7.G.2.4 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.