Siapa pun tolong jawab ini, pakai cara yaa

oc^2 = cb^2 - ob^2
oc^2 = 15^2 - 9^2
oc^2 = 225 - 81
oc^2 = 144
oc = 12 cm

oc = oe = tinggi jajar genjang

L belah ketupat
= 1/2 × d1 × d2
= 1/2 × 18 × 24
= 216 cm^2

L. jajar genjang
= a × t
= 20 × 12
= 240 cm^2

L total = L.belah ketupat + L.jajar genjang
= 216 + 240
= 456 cm^2 (b)