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Right-angled Request

Stage: 2 and 3 Short Challenge Level: Challenge Level:1

Four right-angled triangles can be drawn in each of the squares, plus four formed from two adjacent sides of the rectangle - that makes 12.
Then there are two right-angled triangles formed by joining the points UQS annd PTR.

This makes a total of 14 triangles.

This problem is taken from the UKMT Mathematical Challenges.
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