What Are the CBSE Class 7 Maths Notes on The Introduction of Lines and Angles?

Revision Notes Grade 7 Mathematics Sections 5 for Lines and Angles is part of Class 7 Mathematics Notes for Quick Revision and therefore is available in PDF format for free download. The CBSE Class 7 Mathematics Notes Section Five Lines and Angles provided here are written in a clear and concise manner, taking into account the board pattern and rules. Read on to learn everything there is to know about Mathematics Class 7 Lines and Angles study material. Students would be able to have the last-minute rundown planning in place by referring the Revision Notes of Class 7 Math section five developed by the subject specialist.

Learners will have no doubts and will be able to relax and unwind before their final exams since they will have been thoroughly prepared utilising these study notes and practise papers. In addition, the CBSE Class 7 Revision Notes Lines and Angles PDF is easy to read and contains all of the necessary information in the quickest time possible. You may also utilise the CBSE Class 7 example papers and Class 7 Maths Notes on Lines and Angles for free in PDF format. Collectively, kids will be exam ready, able to answer all types of questions, both positivist and interpretivist, and set goals for themselves to get the highest results in their school exams.

CBSE Class 7 Maths Chapter 5 Revision Notes

The Basics of Important Terms

  • A line segment is described as a drawn line with two ends and is indicated by the letter AB.
  • A line is designated by the letter AB since it has no ends on either side. Collinear points are formed when a single straight line passes through three or more points. Collinear points are P, Q, and R.
  • Ray: A ray is a line that has one terminus and is infinite on the other side.

Differentiation Between Line, Line Segment, and Ray

A line segment is made up of two ends, as you well know. We can draw a line by stretching the two ends in each direction indefinitely. As a result, keep in mind that a line has no endpoints. A ray, on the other hand, has only one terminal (starting point). An angle is generated when two lines or line segments meet.

  • Intersecting Lines: Intersecting lines have been formed when two separate lines cross as well as meet at a place.
  • Parallel Lines: Parallel line is a line which are at the identical distance from one another and never bisect anyplace in a plane.
  • The traversal line is defined as a line that bisects two or even more lines at distinct places.
  • Angles are made up of two rays that originate from the same point.

Types of Angles

  • Acute Angle: An acute angle is any angle that is less than 90 degrees.
  • Obtuse Angle: An obtuse angle is one that measures upwards of 90 degrees but less than 180 degrees.
  • A right angle is defined as an angle that is produced at exactly 90 degrees.
  • A straight angle is defined as an angle that is produced at 180 degrees. A straight line creates an angle in this manner.
  • A reflex angle is defined as an angle that is more than 180 degrees but less than 270 degrees.
  • A full angle is one that measures the entire 360 degrees.

Now, solve this problem:

  1. Fill in the blanks:(i) If two angles are complementary, then the sum of their measures is?

Other Types of Angles

  • Complementary Angles: When the sum of the measurements of two angles equals 90°, the resulting angles are known as complementary angles.
  • Supplementary Angles: Such pairs of angles are known as supplementary angles when the total of the measurements of the two angles is 180°.
  • Adjacent Angles: These are angles that have a shared vertex, a common arm, as well as non-common arms on each side of the common arm. There are no common interior spots between adjacent angles.
  • Linear Pair: A linear pair is a pair of neighbouring angles whose non-common sides produce opposing rays.
  • Vertically Opposite Angles: The vertically opposite angles created when two lines intersect one other are equal.

What are all the main points provided in Chapter Five of NCERT Revision Notes for Class 7 Mathematics? Fifth chapter of Class 7 Maths, ‘Lines and Angles,’ introduces pupils to the realm of Geometry. The chapter starts with fundamental notions including lines, rays, line segments, and angles. Angles are divided into three categories: matching angles, alternative angles, and complementary angles (alternate interior and alternate exterior angles). Following that, questions based on additional angles, neighbouring angles, linear pair, vertically opposing angles, as well as interior angles on the very same end of a transversal are presented. The basic features of the triangle are then discussed later in this section. If you wish to have a better understanding of these ideas and take extensive notes, check out the CBSE Class 7 Mathematics Section five notes. If you wish to study offline, you may also download the PDF version.

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