Four per square, four per rectangle.
8
28
i don,t know
Certain quadrilaterals have right angles. Right trapezoids are the most general example. Rectangles are specialized right trapezoids, and squares are specialized rectangles. There may be more but I can't recall them. Many rhombuses and parallelograms have no right angles. However, they might (and then you'd probably call them squares or rectangles but they are also technically rhombuses, parallelograms and trapezoids).
16 - four in each !
Generally, there are no right angles in a parallelogram, but rectangles and squares can be seen as special parallelograms, as they have all the qualities needed to be classed as parallelograms, and in addition, they have four right angles.
two, squares and rectangles
There are 4 90degree angles in a rectangul
16
The most basic answer would be a square, which is both symmetrical and regular. However, rectangles are also symmetrical, as are hexagons with two opposing 90° angles and four matching 135° angles. In fact, the number of potential shapes are infinite, unless you specify exactly how many right angles the shape must have.
It's got 4 of them.
All rectangles are irregular and each has four equal angles.