Answer:
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.
