rhombus
A quadrilateral is a4-sided figure with no congruent sides.
A rectangle is not an angle (of any kind). It is a kind of quadrilateral.A rectangle is not an angle (of any kind). It is a kind of quadrilateral.A rectangle is not an angle (of any kind). It is a kind of quadrilateral.A rectangle is not an angle (of any kind). It is a kind of quadrilateral.
In a quadrilateral, the diagonals are only congruent for rectangles (or squares, which is a special kind of rectangle). Note: they are not congruent for a Rhombus.
rectangle
It is a rectangle or a square.
It is a right angle.
a acute angle
Two angles are said to be "congruent" if they are equal. To be more precise, their angle measurement is the same.
An obtuse angle
acute
It is a 4 sided parallelogram
Rectangle and square (which is a special kind of rectangle).