true
True
True, if two angles form a linear pair, they are supplementary and add up to 180 degrees, which means they form a straight angle. Conversely, if two angles form a straight angle, they also form a linear pair, as they share a common side and their non-adjacent sides are opposite rays. Thus, both statements are true.
true or false
Yes, it is true that angle 60 degrees has two edges in the angle parts.
false
True
180 degrees minus interior angle = exterior angle and that the 3 exterior angles of a triangle add up to 360 degrees.
It is true
True only if the two angles are adjacent (i.e. have a point in common). By definition, supplementary angles add up to 180° therefore they are linear pairs, if they are adjacent. Otherwise false. Imagine drawing an angle of 40° at the top of the page and another of 140° at the bottom. These angles are supplementary but not a linear pair.
true or false
Yes, it is true that angle 60 degrees has two edges in the angle parts.
False. It forms in the Athenosphere!!
true or false ? perpendicular lines intersect at an angle of 45
False
false
False. There are infinitely many angles at the centre of the circle.
True.