tolong ya kak pake caranya no.1 sampai no.3 makasih bnyk

Luas bangun 1
= p x l
= 18 cm x 13 cm
[tex] = {234 \: cm}^{2} [/tex]

Luas bangun 2
=
[tex] \frac{alas \: x \: tinggi}{2} [/tex]
[tex] \frac{20 \: cm \: x \: 18 \: \: cm}{2} [/tex]
[tex]360 {cm}^{2 } \: \div 2 = 180 \: cm {}^{2} [/tex]