# Integer triangles

The pythagorean triples are well known,
but it is not the only noticeable triangles with integer sides.

For instance triangle with sides 4,5,6 has angle A double of angle B

(proof).
Find all integral sides triangles with the same property A=2B and sides less than 20.

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### n times angles

This can be generalized to angle A = n× B

Find the integer triangle with smallest sides and angle A = 5×B

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### 60° angle

Find all triangles with integer sides less than 20 and a 60° angle.

of course, (1,1,1), (2,2,2) ... (20,20,20) are solutions, but any unequal sides triangle ?

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