Each base angle is 62.5 degrees
The 3rd angle is: 180-55-80 = 45 degrees
An angle of 170 degrees is an obtuse angle.
It is an angle whose measure is 310/360 =31/36 of a full rotation.
Complementary angles.
Acute
Each base angle is 62.5 degrees
The 3rd angle is: 180-55-80 = 45 degrees
An isosceles triangle
180 > x > 90: obtuse 180: straight 360 > x > 180: reflex
Angle included by 50 and 34 = 21 degrees Angle included by 34 and 22 = 125 degrees Angle included by 22 and 50 = 34 degrees Total = 180 degrees
When the angle = 90 degrees, it is a Right Angle. When the angle is greater than 90 degrees, it is an obtuse angle.
An obtuse angle
-- an angle that measures 90 degrees -- an angle whose sides are mutually perpendicular
It is 60 degrees and it is an equilateral triangle.
A straight angle is an angle that measures 180 degrees and is drawn as a straight line. A straight angle is composed of two right angles whose measures are 90 degrees each.
It is the regular equilateral triangle whose each exterior angle is 120 degrees