Class 9 Maths · Chapter 9 · CBSE / NCERT
Propositions and their Converses
Mathematical statements and proof. You’ll learn what a proposition and its converse are, why a true statement can have a false converse, and how to disprove a claim with a counterexample.
12 short lessons · about 48 minutes in all
What you’ll learn
- 1What is a proposition?4 min
- 2The converse of a statement4 min
- 3True statement, false converse4 min
- 4Counterexamples4 min
- 5Prime claims that fail4 min
- 6Factor partners and square numbers4 min
- 7What an argument proves4 min
- 8Both true, both false, or mixed4 min
- 9The converse of the Baudhayana-Pythagoras theorem4 min
- 10Other ways to say if-then4 min
- 11Divisibility tests and converses4 min
- 12Diagonals and the kind of quadrilateral4 min
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What is a proposition? · about 4 minutes
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More Class 9 Maths
The other 13 chapters.
CH 1Orienting Yourself: The Use of Coordinates8 lessonsCH 2Introduction to Linear Polynomials9 lessonsCH 3The World of Numbers10 lessonsCH 4Exploring Algebraic Identities9 lessonsCH 5I’m Up and Down, and Round and Round10 lessonsCH 6Measuring Space: Perimeter and Area10 lessonsCH 7The Mathematics of Maybe: Introduction to Probability9 lessonsCH 8Predicting What Comes Next: Exploring Sequences and Progressions9 lessonsCH 10How Quantities Combine: Understanding Data10 lessonsCH 11The World of Algorithms10 lessonsCH 12Quadrilaterals11 lessonsCH 13Two Variables, One Line12 lessonsCH 14Math of Space: Surface Area and Volume10 lessons
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