Tolong bantu yaa guys:)

PQ/AB = RS/DC = RE/DE
90/100= RS/80 = RE/60

RS = 90x80/100 = 72
RE = 90x60/100 = 54

Luas alun-alun = 72+90/2 x 54 = 4.374 cm^2
Luas tanah = 80+100/2 x 60 = 5.400 cm^2
Luas jalan = 5.400 - 4.374 = 1.026 cm^2
Luas keramik = 20 x 20 = 400 cm^2 = 0,04
banyak keramik = 1026/0,04 = 25.650 buah