09
Aug
Class 9 | Chapter 6 | Lines and Angles | Theorem 6.8
Theorem 6.8: If a side of a triangle is produced, then the exterior angle so formed is equal to the sum of the two interior opposite angles. Theorem 6.7 Class 9 | Home
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09
Aug
Class 9 | Chapter 6 | Lines and Angles | Theorem 6.6
Theorem 6.6: Lines which are parallel to the same line are parallel to each other. Theorem 6.5 Theorem 6.7
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09
Aug
Class 9 | Chapter 6 | Lines and Angles | Theorem 6.5
Theorem 6.5: If a transversal intersects two lines such that a pair of interior angles on the same side of the transversal is supplementary, then the two lines are parallel. Theorem 6.4 Theorem 6.6
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09
Aug
Class 9 | Chapter 6 | Lines and Angles | Theorem 6.4
Theorem 6.4: If a transversal intersects two parallel lines, then each pair of interior angles on the same side of the transversal is supplementary. Theorem 6.3 Theorem 6.5
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09
Aug
Class 9 | Chapter 6 | Lines and Angles | Theorem 6.3
Theorem 6.3 : If a transversal intersects two lines such that a pair of alternate interior angles is equal, then the two lines are parallel. Theorem 6.2 Theorem 6.4
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09
Aug
Class 9 | Chapter 6 | Lines and Angles | Theorem 6.2 | Alternate interior angles theorem
Theorem 6.2: If a transversal intersects two parallel lines, then each pair of alternate interior angles is equal. Theorem 6.1 Theorem 6.3 Prerequisite This is one of the most easy to prove and widely used theorem to prove other theorems…
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09
Aug
Class 9 | Chapter 6 | Lines and Angles | Theorem 6.1 | Vertically opposite angles theorem
Theorem 6.1: If two lines intersect each other, then the vertically opposite angles are equal. Prerequisite This is one of the most used theorems in geometry and one of the most easiest one to prove as well. All you need…
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08
Aug
Class 9 | Chapter 10 | Circles | Theorem 10.3
Theorem 10.3: Equal chords of a circle subtend equal angles at the centre. (NCERT Mathematics) Theorem 10.4 Theorem 10.4
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08
Aug
Class 9 | Chapter 10 | Circles | Theorem 10.1
Theorem 10.1: Equal chords of a circle subtend equal angles at the centre. (NCERT Mathematics) Home page Theorem 10.2
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