## What is Adjacent Angle and Linear Pair: Introduction

## FAQs on Difference Between Adjacent Angle and Linear Pair for JEE Main 2025

1. What is the common vertex in adjacent angles?

The common vertex in adjacent angles refers to the point where the two angles share a common endpoint. It is the vertex that is common to both angles, connecting the two sides of each angle. The common vertex is the point of intersection or the meeting point between the two angles. It serves as the reference point for determining the relationship and properties of the adjacent angles, such as their measurements, angle addition, and angle relationships within geometric figures.

2. How do linear pairs relate to the concept of a straight line?

Linear pairs are closely related to the concept of a straight line. When two lines intersect, they form four angles around the point of intersection. A linear pair is a special case where two adjacent angles formed by the intersecting lines combine to create a straight line. In other words, the two adjacent angles in a linear pair together form a straight angle, which measures 180 degrees. This relationship between linear pairs and straight lines demonstrates that the sum of the measures of the adjacent angles in a linear pair is equal to the measure of a straight angle, reinforcing the connection between angles and the properties of lines.

3. Can adjacent angles overlap or intersect?

No, adjacent angles cannot overlap or intersect. Adjacent angles are angles that share a common vertex and a common side, but they do not overlap or cross each other. The sides of adjacent angles are connected at the common vertex, forming a continuous line. Overlapping or intersecting would mean that the angles share more than just a common vertex and side, which would change their classification. The concept of adjacency implies that the angles are distinct and separate, without any overlapping or intersection between their sides.

4. Are linear pairs always supplementary?

Yes, linear pairs are always supplementary. By definition, a linear pair consists of two adjacent angles formed by the intersection of two lines, creating a straight line. The sum of the measures of the two angles in a linear pair is always equal to 180 degrees. In other words, the angles in a linear pair add up to form a straight angle. Therefore, the angles in a linear pair are guaranteed to be supplementary, meaning their measures sum up to 180 degrees.

5. Can adjacent angles and linear pairs coexist in the same figure?

Yes, adjacent angles and linear pairs can coexist in the same figure. In a figure with intersecting lines, adjacent angles can be found at various points of intersection, sharing a common vertex and side. Some of these adjacent angles may form linear pairs if they are part of a straight line formed by the intersection. In such cases, the adjacent angles will satisfy the properties of both adjacent angles and linear pairs simultaneously. It is common to have adjacent angles within a figure that are not part of a linear pair, while some adjacent angles will indeed form linear pairs.