# Logic and reasoning

Here is a list of all of the skills that cover logic and reasoning! These skills are organized by grade, and you can move your mouse over any skill name to preview the skill. To start practising, just click on any link. IXL will track your score, and the questions will automatically increase in difficulty as you improve!

## Grade 11 skills

- T.4 Proofs involving angles
- T.5 Proofs involving parallel lines I
- T.6 Proofs involving parallel lines II
- T.13 Proofs involving triangles I
- T.14 Proofs involving triangles II
- W.1 Identify hypotheses and conclusions
- W.2 Counterexamples
- W.3 Truth tables
- W.4 Truth values
- W.5 Conditionals
- W.6 Negations
- W.7 Converses, inverses and contrapositives
- W.8 Biconditionals