Types of angles are discussed here in this lesson. We will learn different types of angles. 1. Acute Angle:An angle whose measure is less than 90° is called an acute angle.
∠MON shown in adjoining figure is equal to 60°. So, ∠MON is an acute angle. 2. Right Angle:An angle whose measure is 90° is called right angle.
∠AOB shown in adjoining figure is 90°. So, ∠AOB is a right angle.3. Obtuse Angle:An angle whose measure is greater than 90° but less than 180° is called an obtuse angle.
∠DOQ shown in adjoining figure is an obtuse angle.4. Straight Angle:An angle whose measure is 180° is called a straight angle.
∠XOY shown in adjoining figure is a straight angle. A straight angle is equal to two right angles.5. Reflex Angle:An angle whose measure is more than 180° but less than 360° is called a reflex angle.
∠AOB shown in adjoining figure is 210°. So, ∠AOB is a reflex angle.
6. Zero Angle:An angle measure 0° is called a zero angle.
When two arms of an angle lie on each other, 0° angle is formed.Related Links :● Angle.
Interior and Exterior of an Angle.Measuring an Angle by a Protractor.Types of Angles.Pairs of Angles.Bisecting an angle.Construction of Angles by using Compass.Worksheet on Angles.Geometry Practice Test on angles.
5th Grade Geometry
5th Grade Math Problems
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