## Elementary Geometry for College Students (7th Edition) Clone

1) $\angle$EAB $\cong$ $\angle$ EBA 2) $\triangle$ ABCis isosceles
It is already given that 1) ABCD is an isosceles trapezoid Furthermore 2) $\angle$ EAB $\cong$ $\angle$EBA as from trapezoid theorem the base angle of isosceles trapezoid are $\cong$ Therefore; 3) $\triangle$ ABC is isosceles $\triangle$ as it have the congruent base angles