Question

D
2x + Zy+Zz+ Zw= 360°
These quadrilaterals were convex. What would happen if the
quadrilateral is not convex? Consider quadrilateral ABCD. Split it
into two triangles and find the sum of the interior angles (Fig 3.7).​

Answer 1

D

2

$2 \times + zy + zz + zw = 360$