its #29
if a trapezoid has one pair of congruent base angles then its an isosceles triangle
[4:39:59 PM] Tam Tieu: oh
[4:40:05 PM] Tam Tieu: lol
[5:08:28 PM] *** Tam Tieu sent 9C8B9A27-3F90-4E24-9E5F-E2317EDC505B.jpg ***