Grade 7 · Geometry

CCSS.MATH.CONTENT.7.G.B.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.

Read this standard on the official Common Core site

Lessons that teach this standard

• Area of a Circle: A = πr²

  How to find the area of a circle from its radius or diameter, why the formula squares the radius, and the mistake of using the diameter instead.

• Circumference of a Circle: C = πd

  How to find the circumference of a circle from its diameter or radius, what pi actually is, and how to work backwards from a known circumference.