a straight line
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A 180-degree arc is also called a half-circle.
angle+angle+angle=180 degree then'a+b+c=180 degree example: Q what is the angle of a triangle,if a=50,b=60? answer:a+b+c=180 degree a+50+60=180 degree a+110=180 degreea=180-110 a=70 degree please answar my question
A reflex angle.
straight angle
the angle with a value from 90 degree-180 degree