The statement first “The intersection of two planes is a line." option (a) is correct.
What is a straight line?
A straight line is a combination of endless points joined on both sides of the point.
The slope 'm' of any straight line is given by:
[tex]\rm m =\dfrac{y_2-y_1}{x_2-x_1}[/tex]
We have two planes, Y and Z intersecting each other.
The intersection of two lines is a point.
As we know, if the two planes intersect each other, the intersection will be a line.
If planes are parallel then there will no intersection.
Thus, the statement first “The intersection of two planes is a line." option (a) is correct.
Learn more about the straight line here
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