Question

Two planes intersect in exactly _____.

Answer 1

Answer:

C. one line

Step-by-step explanation:

A plane is a two-dimensional figure which is a flat in surface.

Imagine two planes, like you can take two plain plate of the same size, when you intersect one by another by vertical, you will get a line.

Let me show you a figure here.

You can see the green line.

So the two planes insect in exactly one line.

Answer: C. One line

Answer 2

C

Like two walls they touch the whole line