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Shaded Area

Problem

A square measuring 5 cm by 5 cm is dissected in the following way.

What area is shaded?


Solution

The two shaded triangles combine to make a small square which is one-quarter the size of the large square.

So area shaded is 5times5
4
= 6.25
Problem ID: 22 (Nov 2000)     Difficulty: 1 Star

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