To find an acute angle you need to find out if it is less than 90 degrees.
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3 names of where you would find an acute angle is: Triangle, cone and a star.
An acute triangle
An acute angle is an angle of less than 90°. A 90° angle is a right angle, the angle you find at two adjoining edges of a square. An angle smaller than a right angle is called an acute angle, while an angle larger than it is called and obtuse angle.
1 acute angle = 1 acute angle
An acute angle is an angle less than 90°. So an angle of 17° is an acute angle.