The angles are complementary.
obtuse
There is no special name for a 120º angle.
That is a straight angle.
Congruent angles have the same measure. congruent Kenpachi54 improve answer: Actually, angles don't have to be congruent just to have the same angle measurements A has a right angle is 90 degrees. even if there is a small right angle and a large right angle you know they are both 90 degrees because ALL right angles are 90 degrees, so there is really no name for it.
All triangle must have at least two angles smaller than 90 degrees. There is no point in having a special name for something that always happens.
An octagon has interior angles of 1080 degrees.
Two or more angles that sum to 90 degrees are called complimentary angles.
A pentagon
In Geometry that are many different types of polygons. The polygon whose angles equal up to 180 degrees is a triangle.
complementary
It is an 8 sided octagon whose interior angles add up to 1080 degrees.
It is a regular 8 sided octagon whose interior angles are 135 degrees and its exterior angles are 45 degrees
An angle whose degree measure is greater than 90 but less than 180 is simply in that range. Examples would be 91 degrees, 104.5 degrees, 179.25 degrees, and so on. There is no specific name for angles in this category, but it falls into the broader category of obtuse angles, angles with measures greater than 90.
If each interior angle measures 120 degrees then it is an hexagon which has 6 sides
What's Greek for 18?
A pentagon is a 5 sided polygon whose interior angles add up to 540 degrees
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