tentukan luas jajargenjang P,Q,R,S

tinggi pake pitagoras
15^2=9^2+t^2
225=81+t^2
t^2=144
t=12 cm

luas = axt
=12x12
=144 cm^2

segitiga QRT
RT² = 15²-9²
RT² = 225-81
RT² = 144
RT = √144
RT = 12
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Luas Jajargenjang PQRS
A.t = 12×12 = 144 cm²