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- anonymous

Which sentence about a geometric plane is false?
A. A plane is an undefined term.
B. A plane is a one-dimensional figure.
C. A plane contains at least three points that do not lie on the same line.
D. The intersection of two planes is a line.

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- anonymous

- katieb

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- popitree

A

- Mehek14

A is not the answer...

- Mehek14

plane is undefined

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- popitree

b c and D all are correct only
plane is a flat surface on which a straight line joining any two points on it would wholly lie.

- Mehek14

C. A plane contains at least three points that do not lie on the same line.
not always true
you can have 3 points and all on the same line

- popitree

For straight line u need at least 2 points

- popitree

and for plane at least 3 points and they should not lie on the same line
the last part is important

- Mehek14

There are three words in geometry that are not formally defined. These three undefined terms are point, line and plane. In geometry, a point has no dimension (actual size). Even though we represent a point with a dot, the point has no length, width, or thickness.
@popitree

- popitree

formally not defined does not mean undefined.. the thing is u can not have ideal plane with zero height.. same with line or point.. u can not draw/create physically the ideal point plane or straightline

- popitree

we were arguing unnecessarily.. the correct ans is B

- popitree

cause PLANE is 2 dimensional

- popitree

i guess u did not read the options carefully.. and same here

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