bantu jawab donk kk plase

Jawabanya=C.358
Maaf kalok salah

[tex]A_{persegi}=s^2=10^2=100\\\\\\b=10\\t=\sqrt{15^2-9^2}=12\\A_{trapesium}=\frac{(a+b)t}{2}\\=\frac{(28+10)\times 12}{2}\\=228\\\\A_{total}=328\text{ cm}^2[/tex]