# Mind Map

## Lines and Angles of Class 7

In this chapter we will learn about basic of lines ,rays,line segment, angles.Day to day life we see many example of these form like :Railway track ,Road , Bridge ,scissors and many other things.

### Line Segment

Different types of  A line segment (or simply segment) consists of two points and all the points between them that lie on the line containing the two points. A segment is just like a line except that it has a definite beginning and end.

### Intersection Lines

Lines that have one and only one point in common are known as intersecting lines.

At least  two lines are required for intersection .The common point where all the intersecting lines meet is called the Point of Intersection .All the intersecting lines form angles at the point of intersection.

### Example of Intersecting Lines

In figure, there are two lines AB and CD which intersect each other at O.the common point O is called the point of intersection of two lines AB and CD.

### Non-Intersecting or Parallel Lines

Two distinct lines which are not intersecting are called non-intersecting lines or parallel lines. Lines are parallel if they are always the same distance apart (called "equidistant"), and will never meet.

Q1. What are the lines and angles for Class 7?

Ans. A line segment has two endpoints. A ray has only one endpoint (its vertex). A line has no endpoints on either side. An angle is formed when two lines (rays or line segments) meet.

Q2. What are the seven types of angles in Class 7?

Ans. 7 types of angles in class 7 are:

• Supplementary Angles
• Complementary Angles
• Alternate Angles

Q3. What are the types of lines?

Ans. Types of Line are:

• Horizontal Lines
• Vertical Lines
• Parallel Lines
• Perpendicular Lines

Q4. What do we learn from lines and angles?

Ans. At the end of the lines and angles lesson, students will be able to: Identify and apply the properties of lines and angles. Understand the concept of parallel, perpendicular, complementary and supplementary angles, vertical angles, and parallel lines cut by a transversal.

Q5. What are the properties of lines?

Ans. Properties of Line are mentioned below:

1. A line has infinite length.
2. The line extends in both directions infinitely.
3. The lines do not have any endpoints.
4. The line is a one-dimensional geometrical figure.
5. The line has only length, and it does not have any thickness.
6. Intersecting lines will cross at only one point.