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Angles images - Coggle Diagram
Angles
obtuse angle
they must be more than 90 degree
two rays of an obtuse angle is never paralel
they must be less than 180 degrees
straight angle
they are lines
they are 180 degree
A straight angle equals to two right angles
acute angle
if all three angles are 60 degree its an acute triangle.
they must be less than 90 degree
two rays of an acute angle is never paralel
reflex angle
360 is the sum of interior and reflex angle
more than 180 degrees
less than 360 degrees
right angle
squares corner angle is a right angle
two rays of an right angle are perpendicular
they are 90 degree
