Quadrilateral abcd is an isosceles trapezoid with ad||bc the vase angles are

Option: D is true.

∠A and ∠D,  as well as ∠B and ∠C.

Step-by-step explanation:

In Euclidean geometry, an isosceles trapezoid is a convex quadrilateral with a line of symmetry bisecting one pair of opposite sides. It is a special case of a trapezoid. Alternatively, it can be defined as a trapezoid in which both legs and both base angles are of the same measure.

Hence, the two bases of trapezoid are:

AD and BC.

Hence, the base angles are:

∠A and ∠D,  as well as ∠B and ∠C.

Hence, option: D is true.

answer: just subtact the units and then add the non negative : happy to

step-by-step explanation: