Parallelogram Theorem Proof 4:In square diagonals are equal and bisect perpendicularly

http://www.learncbse.in/ncert-solutions-for-class-9-maths/

In this video we will learn how diagonals in square are equal and bisect each other perpendicularly

In this video, we learn how to apply Congruency Rule to solve Problems on Qudrilaterals. Use parallel lines concept and triangle congruence theorems to prove/solve problems on properties of parallelograms.

Reference book for the above video is

National Council of Educational Research and Training (NCERT) Book for Class 9 Subject: Maths

Parallelogram Theorem Proof 4:In a Square, diagonals are equal and bisect each other at right angles.

00:02 CBSE class 9 maths NCERT Solutions chapter 10 Quadrilaterals q4. Show that the diagonals of a square are equal and bisect each other at right angles.

02:30 Use SAS congruency rule

03:38 Use of rule Vertically opposite angles are equal.

04:05 Use parallel lines property:Alternate interior angles are equal

05:15 Apply CPCT (Corresponding Parts of Congruent Triangles))

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learncbse.in

CBSE solutions for class 9 maths Quadrilaterals

CBSE class 9 maths chapter 10 Quadrilaterals

CBSE class 9 maths NCERT Solutions chapter 10 Quadrilaterals

Solutions for CBSE Class 9 Maths Chapter 10

NCERT solutions for class 9 maths Quadrilaterals

NCERT solutions for CBSE class 9 maths Quadrilaterals

CBSE Class 9 maths solutions Quadrilaterals

Proving that a Quadrilateral is a Parallelogram (Lesson)

Proving a Quadrilateral a Parallelogram | Geometry Proof How To Help

Proving Quadrilaterals are Parallelograms

How to prove Quadrilaterals are Parallelograms using Properties of Parallelograms

parallelogram geometry

characteristics of a parallelogram

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