CBSE Mathematics

  Theorems on Parallelograms Ch-8 Class-IX Explanation of all theorems on Parallelograms chapter 8 class IX, Theorem 8.1, 8.2, 8.3, 8.4, 8.5, 8.6, 8.7, 8.8, 8.9, 8.10, Mid point theorem and its converse. All theorems of chapter 8 class IX. Theorem 8.1: Prove that a diagonal of a parallelogram divides it into two congruent triangles. Given: In Parallelogram ABCD, AC is the diagonal To Prove:  △ACD ≌ △ABC Proof: In △ACD and △ABC,  ∠1 = ∠2  .........   (Alternate angles ∠3 = ∠4  ..........  (Alternate interior angles AC = AC ........   (Common Sides ⇒ By ASA  ≌ rule   △ACD ≌ △ABC   Theorem 8.2: In a parallelogram, opposite sides are equal. Given: ABCD is a parallelogram To Prove : AB = CD and BC = AD Proof:  In △ ACD and △ ABC,  ∠ 1 = ∠ 2  .........   (Alternate angles ∠ 3 = ∠ 4  ..........  (Alternate interior angles AC = AC ........   (Common Sides ⇒ By ASA  ≌ rule   △ ACD ≌ △ ABC ⇒ AB = CD and BC = AD  …..  By CPCT Theorem

E-LESSON PLANNING  FOR MATHEMATICS TEACHER CLASS 10TH lesson plan for maths class X cbse, lesson plans for mathematics teachers,  Method to write lesson plan for maths class 10, lesson plan for maths class X, lesson plan for mathematics grade X, lesson plan for maths teacher in B.Ed. RESOURCE CENTRE MATHEMATICS LESSON PLAN (Mathematics) : CLASS 10 th Techniques of Making E-Lesson Plan :  Click Here Click Here For   Essential Components of Making Lesson Plan Chapter 1 : Number System

E- LESSON PLAN    SUBJECT MATHEMATICS     CLASS 10 lesson plan for maths class 10 cbse lesson plans for mathematics teachers,  Method to write lesson plan for maths class 4, lesson plan for maths class 12 rational numbers, lesson plan for mathematics grade 10, lesson plan for maths in B.Ed. TEACHER'S NAME  :    DINESH KUMAR SCHOOL :   RMB DAV CENTENARY PUBLIC SCHOOL NAWANSHAHR SUBJECT   :    MATHEMATICS CLASS                  :    X  STANDARD BOARD                 :   CBSE LESSON TOPIC / TITLE   :  CHAPTER 13:   SURFACE AREA & VOLUME ESTIMATED DURATION:  This topic is divided into seven modules and are completed in twelve class meetings. PRE- REQUISITE KNOWLEDGE:- Perimeter and Area: Class VII  Visualizing Solid Shapes: Class VII  Visualizing Solid Shapes: Class VIII  Mensuration: Class VIII  Surface Areas and Volumes: Class IX Knowledge of unit conversion in mathematics