Circles and Square

Geometry Level 3

A square just fits within a circle, which itself just fits within another square, as shown in the diagram. What percentage, to one decimal place, is the sum of the two shaded areas out of the area of the big square?

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Circles and Square

Excel in math and science

Master concepts by solving fun, challenging problems.

It's hard to learn from lectures and videos

Learn more effectively through short, interactive explorations.

Used and loved by over 5 million people

Learn from a vibrant community of students and enthusiasts, including olympiad champions, researchers, and professionals.

Learn from a vibrant community of students and enthusiasts,
including olympiad champions, researchers, and professionals.

Learn from a vibrant community of students and enthusiasts,
including olympiad champions, researchers, and professionals.