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Beginner

The bobline

A regular hexagon is folded back and forth along the dotted line. What fraction of the area is yellow?

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Intermediate

The folded triangle

An equilateral triangle is folded with its left side at right angles with the base. What fraction of the total triangle is shaded?

Categories
Beginner

The folded sheet

A rectangular sheet of paper is folded in such a way that two equal angles are formed as shown. What fraction of the resulting quadrilateral is shaded?