If the triangle is less than 90 degrees, it is an acute triangle
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there is many ways to write when classifying a triangle, you can classify it by its sides or angles. When you classify it by angles you can classify it by acute, obtuse, and right triangle. when classyfing it by sides its isosceles, equilateral, and scalene!
Acute Triangle
an acute triangle
An acute triangle.
No. An acute triangle has to have three acute angles. A right triangle has to have one 90 degree angle.