If a quadrilateral is an isosceles trapezoid, the opposite angles are supplementary. THEOREM: (converse) If a trapezoid has its opposite angles supplementary, it is an isosceles trapezoid.

209 questions

198 answers

24 comments

1.8k users

580 Points

510 Points

460 Points

300 Points

270 Points

260 Points

230 Points

210 Points

200 Points