An angle less than 90 degrees is an "acute angle". An angle of exactly 90 degrees is a "right angle". An angle more than 90 and less than 180 degrees is an "obtuse angle". An angle of exactly 180 degrees is a "straight angle". An angle of more than 180 degrees is a "reflex angle".
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we identify it when it has measure ment in its vertex
They are: equilateral, isosceles, obtuse, scalene and right angle triangles
right triangle. obtuse triangle. acute triangle
Yes, congruent angles are angles that have the same measure.
Angles with the same angle measure are congruent.