An acute angle is any angle less than 90 degrees.
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If a triangle has a 100 degree angle, it is an obtuse triangle because a 100 degree angle is an obtuse angle. angle > 90 = obtuse angle = 90 = right angle < 90 = acute
No. An acute triangle has to have three acute angles. A right triangle has to have one 90 degree angle.
An equilateral triangle has three acute (60 degree) angles.
A right triangle has a 90 degree angle and an acute triangle has an angle smaller than 90 degrees.
A right angle triangle has a 90 degree angle and 2 acute angles An obtuse triangle has 1 obtuse angle and 2 acute angles