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Outside the Boxes
Age 11 to 14
ShortChallenge Level 
The diagram shows three squares drawn on the sides of a triangle. What is the sum of the three marked angles?
If you liked this question, here is an NRICH task which challenges you to use similar mathematical ideas.
This problem is taken from the UKMT Mathematical Challenges.
You can find more short problems, arranged by curriculum topic, in our short problems collection.
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