Question

in a quadrilateral ABCD angle A + angle D equals to 180 degree does this mean ab parallel to dc why what special name does this quadrilateral have ?​

Answer 1

Answer:

if this quadrilateral is in a circle then it is a cyclic quadrilateral but if this is just a quadrilateral then it is a parallelogram.

Hope it helped

Answer 2

Answer:

yes,trapezium

Step-by-step explanation:

if angle A + angle D = 180°

then they are part of interior angles formed by transversal of two parallel lines

hence the two sides will always be parallel.

but we cannot say anything about the other pair of opposite sides.

hence in a quadrilateral if one pair of opposite sides are parallel

and special name of such a quadrilateral is trapezium.