# Math Is Fun Forum

Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫  π  -¹ ² ³ °

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## #1 2018-12-19 19:27:37

nhi
Member
Registered: 2018-12-19
Posts: 1

### I am confused

If two lines intersect in more than one point, then they are which of the following?

Unique
Inconsistent
Parallel
The same
None of these

My thought is none of these but wanted other opinions

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## #2 2018-12-19 23:31:30

ganesh
Registered: 2005-06-28
Posts: 40,492

### Re: I am confused

Hi nhi,

"If two lines intersect, then they intersect in exactly one point"
and three noncollinear points define a plane.

Therefore,

If two lines intersect in more than one point, then they are which of the following?

Unique
Inconsistent
Parallel
The same
None of these

'None of these' is right. You are correct!

'The same plane' is the solution.

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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## #3 2018-12-20 09:04:30

Bob
Registered: 2010-06-20
Posts: 9,607

### Re: I am confused

I would say this means they are the same line and intersect everywhere.

Bob

Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

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## #4 2021-06-02 02:22:47

Messi
Member
Registered: 2021-06-02
Posts: 1

None of these

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