Triangles, by definition, have 180 degrees. Angles that are less than 90 degrees are said to be acute.
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A triangle is acute if it is less than 90 degrees. It is obtuse if more than 90 degrees
Less than 90 degrees.
Less than 90 degrees.
An acute triangle has no angle of 90 degrees or more. A right triangle has one angle of 90 degrees; the other two are less than 90 degrees. An obtuse triangle has one angle between 90° and 180°; the other two are less than 90°.
If the triangle is less than 90 degrees, it is an acute triangle