Question

Write an indirect proof to prove theorem 4-2:
If there is a line and a point not on the line, then exactly one plane contains them.

Answer 1

would it be:
if there is a line and a point on the line, then exactly one plane contains them?

Answer 2

Nope the original statement "If there is a line and a point NOT on the line, then exactly one plane contains them" is correct.

If the point is on the lline, then there could be many planes containing both.

Answer 3

so the indirect would be : If the point is on the lline, then there could be many planes containing both. ? @sdfgsdfgs

Answer 4

Oh now I see what the question is asking...okay the indirect proof should be:

If there are many planes that contain both a point and a line, then the point must be on the line.

Answer 5

thanks so much!!

Answer 6

welcome hahahaa next time u have to do more work :P