The diagonals of a kite cross each other at right angles
No.
No
They are either kites or (if the diagonals bisect each other) rhombuses.
Never.
The diagonals of a square cross each other at right angles is one example
in a trapezium 1)atleast one pair opposite sides are parallel 2 )diagonals bisect each other 3)atleast one pair of opposite angles are equal
No.
No the diagonals of a rectangle are not perpendicular because they do not cross each other at right angles
90 decgrees
Yes and they are perpendicular to each other thus forming right angles of 90 degrees
A trapezium has 4 internal angles and 4 external ones, just like any other quadrilateral.