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