a) Yes. The angles can add up to 270 degrees. If you don't believe me go on metacafe.com ang search 270 degree triangle than you will see.
-Paradise430
b) No. A triangle is not a solid and cannot be 3D and therefore if you draw it on a ball it does not actually fall into the category of triangle.
-Monkeypizza13
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The interior angles of a triangle add up to 180 degrees. The exterior angles of a triangle add up to 360 degrees.
The angles add up to 180 degrees, but the angles are 60 degrees.
The Interior angles of a triangle add up to 180° The Exterior angles of a triangle (or any other polygon) add up to 360°.
If you mean angles of 150 degrees, 20 degrees and 20 degrees then it is impossible to construct such a triangle because the angles in any triangle add up to 180 degrees and the angles given add up to 190 degrees.
No, the angles in a quadrilateral add up to 360 degrees. The angles in a triangle add up to 180 degrees.