Question

CAN SOMEONE HELP PLS?? I rlly dont get this.

Answer 1

The little square on the angle means that the entire angle is 90 degrees

The larger angle is made up of two angles of measure 'x - 18' and 'x'

Let's put that into an equation form:

(x - 18) + (x) = 90

2x - 18 = 90

2x = 108

x = 54

So x = 54

Hope that helps!