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NCERT Solutions for Class 9 Maths Chapter 8 Quadrilaterals

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The chapter has the core concepts of Quadrilaterals, which are the figures formed by joining four points. Illustrations and examples have been provided to depict the quadrilateral shapes. Certain measurements describe the measurement of a partial quadrilateral. Certain parameters describe the difference between the shapes of quadrilaterals. Further, the chapter highlights the angle sum property of a quadrilateral and properties of a parallelogram with two congruent angles. A parallelogram is formed when the diagonals of quadrilaterals intersect with each other. Various shapes such as rhombus and rectangle intersect with certain points to form angles, and then the chapter ends with briefing out the line-segment and parallel line properties.

  • The chapter begins with the introduction and need of quadrilaterals through illustrations.
  • A quadrilateral has four sides, four angles, and four vertices.
  • Parallelograms are formed when the opposite sides of a quadrilateral are the same.
  • Further, the rectangle is formed by the bisectors of a parallelogram.
  • Many of the shapes such as rhombus, square, trapezium, and parallelograms are interrelated with each other.
  • Various conditions for a quadrilateral to be a parallelogram have been described.
  • The Mid-point Theorem states that -The line segment in a triangle that joins the mid-point of two sides of a triangle is considered to be parallel to its third and half of the length of the third side.

 

Class 9 Maths Chapter 8 Quadrilaterals NCERT Exercises, Question and Answers - Download PDF

 

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Class 9 Maths NCERT Solutions Chapterwise PDFs

NCERT Solutions For Class 9 Maths Chapter 1 Number System NCERT Solutions For Class 9 Maths Chapter 2 Polynomials NCERT Solutions For Class 9 Maths Chapter 3 Coordinate Geometry
NCERT Solutions For Class 9 Maths Chapter 4 The Linear Equations in Two Variables NCERT Solutions For Class 9 Maths Chapter 5 Introduction to Euclid’s Theory NCERT Solutions For Class 9 Maths Chapter 6 Lines and Angles
NCERT Solutions For Class 9 Maths Chapter 7 Triangles NCERT Solutions For Class 9 Maths Chapter 9 The Areas of Parallelograms and Triangles NCERT Solutions For Class 9 Maths Chapter 10 Circles
NCERT Solutions For Class 9 Maths Chapter 11 Constructions NCERT Solutions For Class 9 Maths Chapter 12 Heron’s Formula NCERT Solutions For Class 9 Maths Chapter 13 Surface Areas and Volumes
NCERT Solutions For Class 9 Maths Chapter 14 Statistics NCERT Solutions For Class 9 Maths Chapter 15 Probability

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