Answer: An angle that measures 180° would be a straight angle.
Explanation:
This question is asking to identify an angle that measures 180°. To find if this angle is acute, obtuse, right, or straight is to measure them each.
Acute Angle - Acute angles are angles that measures less than 90° degrees
Obtuse Angle - Obtuse angles are any angles that greater than 90° with the exception of an 180° angle
Right Angle - Right angles are angles that are exactly equal to 90°
Straight Angle - Straight angles are defined angles that are exactly 180 ° degrees.
Since a straight angle is 180° degrees. Therefore, this angle would be defined as a straight angle. Hope this helps!