Two lines intersecting at a right angle form a line.
are parallel.
are perpendicular.
form aray

Form aray

Step-by-step explanation:

Neither form a line and it also have both parts and perpendicular

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,