Question

name all parts of a quadrilateral

Answer 1

It is named by using 4 capital letters as the vertices (in sequential order clockwise or anticlockwise)
Quadrilateral ABCD has :
1. 4 vertices - A . B . C . D
2. 4 sides - $\overline{AB}$ , $\overline{BC}$ , $\overline{CD}$ , $\overline{DA}$ .
3. 4 angles - $\angle A$ , $\angle B$ , $\angle C$ , $\angle D$ .