Please help :( it doesnt make any sense​

I’m guessing that x is the angle on the right that isn’t shown?
Anyways if that’s the case then:

We know that the sum of all the angles of a triangle add up to 180 degrees.
In this triangle we know that one angle is 55 degrees and the other is 90 degrees, so to find the last angle we do the sum of all the angles and we remove the 2 angles:

180- (55+90)= 35 degrees.

x= 35 degrees

The answer to your question is: 0.5 meters

Step-by-step explanation:

Data

a single sheet thick = 1 x 10⁻⁴ meters

# of reams = 10

Ten reams = 5 x 10³ pieces of paper

How tall is this stack of paper?

Rule of three

                     1 sheet of paper   1 x 10⁻⁴ meters

                  5 x 10³ sheets                  x

               x = ( 5 x 10³)(1 x 10⁻⁴) / 1

              x = 0.5 meters