4. In quadrilateral ABCD, ∠A + ∠D = 180o. What special name can be given to this quadrilateral? ∠A + ∠D = 180o. What special name can be given to this quadrilateral? 4. In quadrilateral ABCD July 1, 2021 Category: Chapter 8 - Quadrilaterals , Maths , NCERT Class 9 ,
