tolong dijwab teman teman

Luas persegi
=s×s
=18cm×18cm
=324cm²

Luas trapesium
=1/2×(a+b)×t
=1/2×(18cm+9cm)×9cm
=1/2×27cm×9cm
=1/2×243cm
=121,5cm²

Luas yg tidak diarsir
=324cm²-121,2cm²
=202,5cm²