div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imagea href=https:reader039fdocumentsinreader039viewer20220331185e98d81c2db2be46b277fb76html5page1jpg target=_blank img data-url=documentlesson-91-properties-of-parallelograms-if-a-quadrilateral-is-a-parallelogramhtmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: Lesson 91: Properties of ParallelogramsIf a quadrilateral is a parallelogram then its opposite angles are congruent Prove that the opposite angles of a parallelogram are congruent loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader039fdocumentsinreader039viewer20220331185e98d81c2db2be46b277fb76html5thumbnails1jpg width=140 height=200 adivpLesson 91: Properties of Parallelogramspdivdiv class=trans-pagebutton class=gotoPage data-page=2Page 2button div class=trans-imagea href=https:reader039fdocumentsinreader039viewer20220331185e98d81c2db2be46b277fb76html5page2jpg target=_blank img data-url=documentlesson-91-properties-of-parallelograms-if-a-quadrilateral-is-a-parallelogramhtmlpage=2 data-page=2 class=trans-thumb lazyload alt=Page 2: Lesson 91: Properties of ParallelogramsIf a quadrilateral is a parallelogram then its opposite angles are congruent Prove that the opposite angles of a parallelogram are congruent loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader039fdocumentsinreader039viewer20220331185e98d81c2db2be46b277fb76html5thumbnails2jpg width=140 height=200 adivpPage 421pdivdiv class=trans-pagebutton class=gotoPage data-page=3Page 3button div class=trans-imagea href=https:reader039fdocumentsinreader039viewer20220331185e98d81c2db2be46b277fb76html5page3jpg target=_blank img data-url=documentlesson-91-properties-of-parallelograms-if-a-quadrilateral-is-a-parallelogramhtmlpage=3 data-page=3 class=trans-thumb lazyload...