Each of the interior angles of an equilateral triangle is 120 degrees.
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An equilateral triangle has 3 interior equal acute angles each measuring 60 degrees. In general an acute angle is greater than 0 but less than 90 degrees.
measure of exterior angle of triangle is equal to sum of interior angles. for eg. In triangle ABC, angle C is exterior angle angle A and angle B are interior angles so, C=A+B
The largest exterior angle measure is 120o. It is the exterior measure of an equilateral triangle (which is a regular polygon).
45°, 45°, and 90°
The shortest side of a triangle is opposite to the smallest interior angle.