Parallelograms or isosceles trapezium.
Chat with our AI personalities
No. An isosceles trapezium (isosceles triangle with its apex removed) would have congruent diagonals but it is not a parallelogram.
All quadrilaterals have 2 diagonals
No. A small pentagon will have smaller diagonals than a large pentagon! However, all the diagonals of a regular pentagon will be congruent.
All quadrilaterals (four sided shapes) have 2 diagonals.
It has 2 diagonals in common with all other 4 sided quadrilaterals