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Square Pegs

Which is a better fit, a square peg in a round hole or a round peg in a square hole?

Bull's Eye

What fractions of the largest circle are the two shaded regions?

Squaring the Circle

Bluey-green, white and transparent squares with a few odd bits of shapes around the perimeter. But, how many squares are there of each type in the complete circle? Study the picture and make an estimate.

Blue and White

Age 11 to 14 Challenge Level:

This printable worksheet may be useful: Blue and White.