CoolHandLouis
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 11 How to explain the perpendicularity of two lines to a High School student? 3 can a number of the form $x^2 + 1$ be a square number? 1 Probability Exercise - Contracts 1 Proof vs Practice 0 Practical implementation of Mathematics

### Reputation (342)

 +101 can a number of the form $x^2 + 1$ be a square number? +50 How to explain the perpendicularity of two lines to a High School student? +2 can a number of the form $x^2 + 1$ be a square number?

### Question (1)

 0 Perpendicular to Z axis or Skew to Z axis? (Definition of Perpendicular)

### Tags (9)

 12 education × 3 1 probability 11 functions 0 geometry 11 graphing-functions 0 definition 3 elementary-number-theory 0 trigonometry 1 soft-question × 3

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 English Language Learners 6,168 rep 628 English Language & Usage 400 rep 112 Mathematics 342 rep 17 Meta Stack Exchange 257 rep 111 Philosophy 221 rep 16