Question

For the construction of a quadrilateral, we should know at least ______ measurements.
(a)3
(b)4
(c)5
(d)6​

Answer 1

Answer:

5

................................

Answer 2

Answer:

Thus a quadrilateral has 10 elements (4 sides, 4 angles and 2 diagonals) or measurements. To construct a unique quadrilateral we need to know 5 measurements (elements). Note: To construct a unique quadrilateral simply the knowledge of any five elements is not sufficient.