Not necessarily. The literal meaning of quadrilateral is 'four sides' - this can mean any four-sided shape. A rhombus and a trapezoid are both quadrilaterals - but neither has angles of 90 degrees.
Chat with our AI personalities
A square. Four 90 degree angles allow a quadrilateral to have equal sides.
rhombus
A Parallelogram
No special type, and so without a special name.
Equiangular quadrilaterals are four-sided polygons that have equal angles. These include squares (90 degree angles) and rectangles (90 degree angles).