Geometry: An Interactive Journey to Mastery

8. ([SODLQLQGHWDLOZK\WKH¿JXUHIRUPHGE\WKHPLGSRLQWVRIWKHVLGHVRIDUKRPEXVLVVXUHWR
   be a rectangle.


9. Quadrilateral DUCK is a rhombus. Two of its vertices are D ͼ௘௘ͽDQGC ͼ௘í௘ͽ
   D௘ͽ )LQGWKHVORSHRIGLDJRQDOUK.
   E௘ͽ )LQGWKHHTXDWLRQRIWKHOLQHUKHJJG.


10. Given: TWXY is a parallelogram.
    YPATW.
    ZWATY.
    TP = TZ.
    Prove: TWXY is a rhombus.
    ͼ௘6HHFigure 14.8௘ͽ TP W

Y X

Z

Figure 14.8