They can, if you start off with a square, and make a diagonal line from a little out on the top line to the bottom right-hand corner.
Yes. Those trapezoids with four right angles are called squares. Since in order to be a trapezoids, a shape must be a quadrilateral with with one set of parallel lines, and a square fits those requirements. In conclusion, the trapezoids that have four right angles are squares.
No
noIt has 2 obtuse angles and 2 acute angles though.
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).
No, because it would then be considered a rectangle.
Rhombuses and trapezoids have no right angles by definition.
Yes. Those trapezoids with four right angles are called squares. Since in order to be a trapezoids, a shape must be a quadrilateral with with one set of parallel lines, and a square fits those requirements. In conclusion, the trapezoids that have four right angles are squares.
No
Yes, a trapezoid can have 3 right angles.
noIt has 2 obtuse angles and 2 acute angles though.
Trapezoids do not have right angles. You probably thinking of a polygon or quadralateral.
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).
Because they don't have right angles.
No, because it would then be considered a rectangle.
Squares, rectangles, and some trapezoids.
Trapezoids actually have 5 angles (Including the straight angle).
Trapezoids can have various angle configurations, but they do not necessarily have to have 2 obtuse and 2 acute angles. A trapezoid can have two acute angles and two obtuse angles, or it can have all angles being right angles in the case of a right trapezoid. The specific angles depend on the type of trapezoid and the lengths of the sides.