I assume there are four sides, and the adjacent sides of two opposite vertices are equal.
This way, the quadrilateral is made up of two isosceles triangles, back to back. Take a pencil and draw the shape. See if you recognize it.
Hint: have you flown a kite before?
i have no parallel sides. my adjacent sides are equal. my diagonals intersect at right angles. what am i?
2 answers
kite