Tolong dijawab no.10 ya, utk persiapa Ujian

b nomer 11 ...... . .

cari sisi RT terlebih dahulu
RT^2 = RQ^2 - QT^2
RT^2 = 15^2 - 9^2
RT^2 = 225 - 81
RT^2 = 144
RT = 12 cm

luas jajar genjang = alas x tinggi
= 7 x 12 = 84 cm