NCERT Archives – Page 46 of 54

13 Aug

Class 9 | Chapter 7 | Triangles | Theorem 7.3

Class 9 - TrianglesClass 9 math tutorials, math, mathemafia, NCERT, theorems on triangles, Triangles

Theorem 7.3: The sides opposite to equal angles of a triangle are equal Theorem 7.2 Theorem 7.4

13 Aug

Class 9 | Chapter 7 | Triangles | Theorem 7.2 | Isosceles triangle theorem

Class 9 - TrianglesClass 9 math tutorials, Isosceles triangle theorem, math, mathemafia, NCERT, theorems on triangles, Triangles

Theorem 7.2: Angles opposite to equal sides of an isosceles triangle are equal. Theorem 7.1 Theorem 7.3 Prerequisite It is quite easy to prove this theorem and it’s been proved by two different ways in the above tutorial: Using angle…

13 Aug

Class 9 | Chapter 7 | Triangles | Theorem 7.1

Class 9 - TrianglesClass 9 math tutorials, math, mathemafia, NCERT, theorems on triangles, Triangles

Theorem 7.1: (ASA congruence rule) Two triangles are congruent if two angles and the included side of one triangle are equal to two angles and the included side of other triangle. Home Theorem 7.2

13 Aug

Class 9 | Chapter 10 | Circles | Theorem 10.6

Class 9 - CirclesCircles, Class 9 math tutorials, math, mathemafia, NCERT, theorems on circles2 Comments

Theorem 10.6: Equal chords of a circle (or of congruent circles) are equidistant from the centre (or centres). Theorem 10.5 Theorem 10.7

11 Aug

Class 9 | Chapter 10 | Circles | Theorem 10.5

Class 9 - CirclesCircles, Class 9 math tutorials, math, mathemafia, NCERT, theorems on circles

Theorem 10.5: There is one and only one circle passing through three given non-collinear points. Theorem 10.4 Theorem 10.6

11 Aug

Class 9 | Chapter 10 | Circles | Theorem 10.4

Class 9 - CirclesCircles, Class 9 math tutorials, math, mathemafia, NCERT, theorems on circles

Theorem 10.4: The line drawn through the centre of a circle to bisect a chord is perpendicular to the chord. Theorem 10.3 Theorem 10.5

11 Aug

Class 9 | Chapter 10 | Circles | Exercise 10.3 | Question 3

Class 9 - CirclesCircles, Class 9 math tutorials, math, mathemafia, mathematics, NCERT

Question 3: If two circles intersect at two points, prove that their centres lie on the perpendicular bisector of the common chord. Question 2 Ex: 10.4 | Question 1

11 Aug

Class 9 | Chapter 10 | Circles | Exercise 10.3 | Question 2

Class 9 - CirclesCircles, Class 9 math tutorials, math, mathemafia, mathematics, NCERT

Question 2: Suppose you are given a circle. Give a construction to find its centre. Question 1 Question 3

11 Aug

Class 9 | Chapter 10 | Circles | Exercise 10.3 | Question 1

Class 9 - CirclesCircles, Class 9 math tutorials, math, mathemafia, mathematics, NCERT

Question 1: Draw different pairs of circles. How many points does each pair have in common? What is the maximum number of common points? Ex: 10.2 | Question 2 Question 2

10 Aug

Class 9 | Chapter 10 | Circles | Exercise 10.2 | Question 2

Class 9 - CirclesCircles, Class 9 math tutorials, math, mathemafia, mathematics, NCERT

Question 2: Prove that if chords of congruent circles subtend equal angles at their centres, then the chords are equal. Question 1 Ex: 10.3 | Question 1

NCERT

Class 9 | Chapter 7 | Triangles | Theorem 7.3

Class 9 | Chapter 7 | Triangles | Theorem 7.2 | Isosceles triangle theorem

Class 9 | Chapter 7 | Triangles | Theorem 7.1

Class 9 | Chapter 10 | Circles | Theorem 10.6

Class 9 | Chapter 10 | Circles | Theorem 10.5

Class 9 | Chapter 10 | Circles | Theorem 10.4

Class 9 | Chapter 10 | Circles | Exercise 10.3 | Question 3

Class 9 | Chapter 10 | Circles | Exercise 10.3 | Question 2

Class 9 | Chapter 10 | Circles | Exercise 10.3 | Question 1

Class 9 | Chapter 10 | Circles | Exercise 10.2 | Question 2

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