An angle that measures 90 degrees is called?

An angle that measures 90 degrees is called?

• A. Right angle
• B. Straight angle
• C. Obtuse angle
• D. Acute angle

Answer: (A)

Angles are classified by their size, and a 90-degree angle is a right angle. This exact measure happens when two lines meet perpendicularly, creating a perfect corner—think of the corner of a square or the angle of a door opening straight. A straight angle is 180 degrees, a straight line. An obtuse angle is bigger than 90 but less than 180, and an acute angle is smaller than 90. So, when the measure is exactly 90 degrees, the angle is called a right angle.

Angles are classified by their size, and a 90-degree angle is a right angle. This exact measure happens when two lines meet perpendicularly, creating a perfect corner—think of the corner of a square or the angle of a door opening straight. A straight angle is 180 degrees, a straight line. An obtuse angle is bigger than 90 but less than 180, and an acute angle is smaller than 90. So, when the measure is exactly 90 degrees, the angle is called a right angle.