Answer:
it is
<h3> 12</h3>
Step-by-step explanation:
beacaus in Quadrilateral the opposite sides are equal
<h3> (note down opposite sides and opposite angles are equal)</h3>
<h3>and the diagram is Quadrilateral </h3>
A Quadrilateral has 4sides,4angles,2 diagonals and the sum of the interior and exterior of Quadrilateral is equal to 360°
Interior means=inside
Exterior means=outside
<h3>Polygon means: triangle, Quadrilateral, Pentagon,Hexagon.....etc </h3><h2> (HOPE YOU UNDERSTAND)</h2>