All the angles of a quadrilateral are equal. What special name is given to this quadrilateral?
Answer: Rectangle or Square
Solution.
We know that sum of all angles of a quadrilateral is
If PQRS is a quadrilateral,
…..(1)
It is given that all the angels are equal
i.e.,
Put in equation 1 we get
Here all the angles of a quadrilateral are .
Hence given quadrilateral is either a rectangle or square. We cannot say which one it is, as nothing is given about the length of the sides.