If two planes intersect, their intersection is a line. true false

True

Step-by-step explanation:

A plane is an undefined term in geometry . It is a two-dimensional flat surface that extends up to infinity .

When two planes intersect then their intersection is a line which is one -dimensional.

For example :-  The intersection of two walls in a room is a line in the corner.

When two planes do not intersect then they are called parallel.

Therefore , The given statement is "True."

8 2/3 is the answer

step-by-step explanation: just use a calculator