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## 'Midpoint Triangle' printed from http://nrich.maths.org/

Take a square of paper.

Put a mark half way along each side (ABCD). (You can do this easily
by folding.)

Join two midpoints (DC), as shown, then mark half way along the
new line (E).

Now join this new midpoint to the other two. (EA, EB).

Cut along these lines.

Now use the four shapes to make a triangle.