in this case ,construction of triangle is not possible.

If two angles of a triangle sum is 90 degrees, it is a --- triangle.

diagonals of a quadrilateral equal, and perpendicular bisector of each other is a-----

diagonals are perpendicular bisectors of each other,but

unequal ,the quadrilateral is called ---

in a quadrilateral , non parallel sides are equal with a pair of opposite parallel sides. This quadrilateral is a

To construct a square , the number of sides required is/are ----