This topic focuses on determining the full area of a circle from the given area of a sector. Skills practiced include calculating the area of circular sectors, understanding fractions of whole circles, and applying the value of pi (π) in arithmetical operations, all within the context of basic geometry involving circles. Each problem provides a fraction of a circle's area, and students must calculate the area of the whole circle based on the given sector's area. This offers valuable practice in applying geometric and proportional reasoning skills.

Work on practice problems directly here, or download the printable pdf worksheet to practice offline.

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Part Circle - Part Area and Fraction to Full Area (Pi Value)

Complete these online problems with 80% or 4 correct answers in a row. Results are immediate.


The area of the green shaded 1/5 sector is 4/5π. What is the area of the full circle?

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