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Liviu Trifoi · Answer 1 · 2019-01-28T21:23:49+0000

The sum of an exterior angle and its interior angle copart = 180 (a line)

So, 180 - 150 = 30
And: 180- 120 = 60

So those are 2 angles. The three angles of a triangle add to 180

180 -(30 + 60) = 90

So
the angles are 30, 60, 90

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