No.
Take a look at this picture...
http://www.onemathematicalcat.org/Math/Geometry_obj/graphics/summing_exterior_angles.png
The exterior angle + the interior angle = 180 degrees
180 - the interior angle = the exterior angle
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An isosceles triangle has two equal angles and one different angle. The sum of the angles in any triangle is always 180 degrees. Therefore, the two equal angles in an isosceles triangle must add up to 180 degrees minus the different angle. So, each of the two equal angles in an isosceles triangle measures (180 - x) / 2 degrees.
Exterior and interior angles at the vertex of a triangle add up to 180 degrees
Well, honey, the biggest angle you can have in a triangle is 180 degrees. That's because the sum of all angles in a triangle is always 180 degrees. So if you've got one angle that's 180 degrees, the other two angles gotta be zero, which basically means you ain't got no triangle at all.
Angle A + Angle B + Angle C = 180 degrees. 30+90+C=180 120+C=180 C=60 degrees.
Yes it does. Good work!