a right angle, a obtuse angle, and an acute angle.
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Two exterior angles are consecutive if they are formed at vertices which are next to one another.
The interior angle of a polygon is the angle formed by two adjacent sides of a polygon where the angle lies inside the area formed by the polygon. The exterior angle is that formed by one of these sides and the line formed by extending the other side. Consequently, External angle = 180 deg - Internal angle. Because they form supplementary angles, it does not matter which of the two sides you extend.
if you have two triangles you can prove them congruent by stating that all of the sides are congruent, hence (SSS=Side, Side, Side). You can also do the same by stating SAS (Side, Angle, Side) or ASA (Angle, Side, Angle). Using these methods, everything must be in order and consecutive to prove the triangles congruentgood questionRead more: What_is_the_sss_rule
If you mean an angle then an angle is formed by two straight lines meeting at a vertex.
A 90 degree angle is formed at a right angle.