Question

The measures of three angles in a given quadrilateral are 90, 90, and 90 degrees.. What is the measure of the unknown angle? and this figure could be what type of quadrilateral.

Answer 1

Every quadrilateral's interior angles have a sum of 360 degrees
so if 90+90+90=270, subtract that from 360.
360-270=90<-- unknown angle
If all four interior angles are 90 degrees, then that means that it is a square, because that is a characteristic of a square.