Area & Circumference of Circle

Examples, solutions, worksheets, videos, and lessons to help Grade 7 students 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.

Common Core: 7.G.4

Suggested Learning Targets

• I can state the formula for area and circumference of a circle.
• I can use the formula for the area of a circle to solve problems.
• I use the formula for the circumference of a circle to solve problems.
• I can identify or produce a logical conclusion about the relationship between the circumference and area of a circle (e.g., given three circles with the areas A1>A2>A3, the circumferences satisfy C1>C2>C3).
• I can write my solutions in terms of pi(π), decimals, and fractions.

Know and use the formulas for area and circumference of a circle (Common Core 7.G.4)

Circle: Area and Circumference (7.G.4)
What is pi?
Rule: The ratio of a circle’s circumference to it’s diameter is always the same number.
Circumference Formula
Area Formula
In this video, students will learn to find the area of a circle using the formula. This video relates to Common Core Standard 7.G.4. Students learn about pi, the radius, square numbers and the procedure for finding the area of a circle.

Circumference of a circle: Finding diameter and area given the circumference

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Find circumference given area

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Circles Radius Diameter & Pi Learn circumference, radius, pi and more through music.

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