Area of Parallelograms and Triangles (Part 1) - Full Chapter Revision | Class 9 Maths

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✅ In this video,

✔️ Class: 9th
✔️ Subject: Maths
✔️ Chapter: Area of Parallelograms and Triangles
✔️ Topic Name: Area of Parallelograms and Triangles (Part 1) - Full Chapter Revision /Concepts/Formula
✔️ Topics Covered in This Video (Prince Sir): In this video, Prince Sir will discuss the Full Chapter Revision /Concepts/Formula of Area of Parallelograms and Triangles (Part 1) for Class 9th Maths. Prince Sir will explain the important points related to the subject that students should keep in mind while answering the questions. Through this video, he will help students to clear their doubts and understand the topic better.
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00:00 Introduction: Area of Parallelograms and Triangles
00:25 Topics to be Covered
01:00:53 Euclidean area axiom
01:52:57 Theorems related to areas
04:36:05 Website Overview
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◆0:30 *INTRO OF THE CHAPTER*
◆1:38 *COMMENCEMENT OF PLANER REGION & AREA*
◆19:38 *EUCLIDEAN AREA AXIOMS* (what is AXIOM & POSTULATE)
• 38:09 *EXISTENCE POSTULATE*
•48:57 *DOMINANCE POSTULATE (inequality)*
54:08 subset_1
•01:02:00 *DOMINANCE POSTULATE (equality)*
01:07:48 subset_2
•01:10:40 *POSTULATE OF ADDITIVITY*
•01:24:35 *POSTULATE OF CONGRUENCE*
◆1:35:26 *FIGURES ON THE SAME BASE AND BETWEEN THE SAME PARALLELS*
◆THEOREMS RELATED TO AREAS
•1:53:22 *T-1_||gm on the same base & between the same parallels are equal in area*
•2:22:17 *T-2_The area of a ||gm is equal to the the product of its any side & the corresponding altitude*
•2:43:00 *T-3_||gms on equal bases & between the same || are equal in area*
•2:59:21 *T-4_A diagonal of a ||gm divides it into 2 ∆s of equal area*
•3:09:31 *T-5_(converse theorem) Parallelograms on the same base and having equal areas lie between the same parallels*
•3:33:06 *T-6_∆s on the same base and between the same parallel lines are equal*
•3:59:02 *T-7_area of a ∆=½×b×h*
•4:19:23 *T-8_If a ∆ & a ||gm are on the same base, & btw the same parallels then the area of the ∆ is equal to the half of the area of the ||gm*
____🙏🏻 _*_The End_*_ 🙏🏻_

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-ji

Area of circle is 55m², -(1)
Area of rectangle is 55m², -(2)
Therefore, Area of circle 55m²=area of rectangle is 55m²
Area of circle=area of rectangle
πr²=l×b
Area of circle=l×b🤔
(According to theorem 9.2)

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