An angle that is 87 degrees is an "acute" angle. This is because its measurement are less than 90. Anything above 90 degrees would be considered an "obtuse" angle.
triangle
It is: 87+3 = 90 degrees
it is an acute angle.
It is a reflex angle
A 90 degree angle is a right angle.
an acute angle, which is an angle less then 90
An 87 degree angle!
A 12 degree angle is an acute angle.
It is: 87+3 = 90 degrees
A reflex angle
it is an acute angle.
Acute triangle - all of the angles are less than a right angle (90°).Scalene triangle - none of the sides or angles are congruent. It can be shown that if no two angles are the same, then no two sides are the same using the Law of Sines and Law of Cosines.
acute
An obtuse angle
An obtuse angle.
Reflex
An obtuse angle.
A 120 degree angle is an obtuse angle. This means that the angle is between 90 and 180 degrees.