Answer:
Square
Explanation:
Square: A square is a plane figure which consists of four sides and four angles which are always in equal in measure and also, the angles of the square are always right angled.
The given statement is:
If a quadrilateral has sides that measure 4 in. and angles that all measure 90°, we can consider the quadrilateral to be a square, because all the sides have measure 4 inches and all the angles are 90° which is same as the definition of square.