Question

to construct a quadrilatral we need to know three sides and how many included angels​

Answer 1

In construction of quadrilaterals we know that a quadrilateral has ten parts in all: four sides, four angles and two diagonals.

To construct a quadrilateral, we shall need data about five specified parts of it. We consider the following five cases:

1. Construction of quadrilaterals when four sides and one diagonal are given.

2. Construction of quadrilaterals when three sides and two diagonals are given.

3. Construction of quadrilaterals when three sides and two included angles are given.

4. Construction of quadrilaterals when two adjacent sides and three angles are given.

5. Construction of quadrilaterals when four sides and one angle are given.

Hope this would help.