parallelogram-theorem-1diagonals-of-a-parallelogram-are-equal-then-it-is-a-rectangle

Parallelogram Theorem 1:Diagonals of a parallelogram are equal then it is a rectangle.Proving a parallelogram is a rectangle.

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

In this video we will learn how a parallelogran is a rectangle, provided diagonals of a parallelgram are equal.

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

00:02 CBSE class 9 maths NCERT Solutions chapter 10 Quadrilaterals q2 If the diagonals of a parallelogram are equal, then show that it is a rectangle.

00:54 Proof , consider two triangles for similarity test.

01:51 Apply SSS congruency Rule

03:10 Apply properties of parallel lines.Co interior angles are supplementry.

04:24 In Rectangle, Each pair of opposite sides are equal. Each angle is a right angle.

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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

Quadrilaterals Properties of Parallelograms

parallelogram and its properties application to solve problems

parallelogram properties geometry

parallelogram geometry

characteristics of a parallelogram

Proving a parallelogram is a rectangle.

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