Question

[Geometry] help pls!!!! is the answer 70?

Answer 1

Notice the picture below

in a rectangle, all angles are 90 degrees and the diagonals are equal

meaning the diagonals bisect each other, they cut in equal halves

so. those two sides are equal, and thus they make up an isosceles triangle
on the sides

if those two sides are equal, the angles they make on the other side are equal

so if angle D is 55 degrees, angle A is 55 degrees
and the missing angle is 180 - (55 + 55) or 70
that's just the left-side

now, angle "x" on the right side, is a vertical angle of that angle on the left,
and vertical angles are equal, thus x = 70