yang nomer 7 gimana ya?tolong bantuin dong.

perhatikan KPO sebangun dg NMO, sehingga
OP/ON = KP/NM atau OP = (ON x KP)/NM
OP = (10 x 8)/3 = 20/3
luas LMOP = luas LMK - KPO
luas LMK= (LM x KL)/2
= (20 x (20/3 + 10))/2
= 500/3
luas KPO = (PO x KP)/2
= (20/3 x 8)/2
= 80/3
jadi lyas PLMO = 500/3 - 80/3
=420/3 = 140