Interior and Exterior of an Angle

Interior and exterior of an angle is explained here.

The shaded portion between the arms BA and BC of the angle ABC can be extended indefinitely.

Interior and Exterior of an Angle

This portion is called the interior of the angle. X is a point in the interior of the angle. The point Y lies in the exterior of the angle. 

The point Z lies on the angle.

Interior and Exterior of an Angle

In the above figure, here ∠1 is called the interior angle because it lies inside the two arms. ∠2 is called the exterior angle. Whenever two rays meet, two angle are formed – one an interior angle and other an exterior angle. The size of an angle is measured by the amount of turn or rotation of two arms and not by how long the arms appear to be.

Interior and Exterior of an Angle

Here ∠a is greater than ∠b, ∠b is greater than ∠c.

● 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 Page

5th Grade Math Problems

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