tolong bantu cari luas gabungan

kiri
A= a x t : 2
  = 10 x 9 : 2
  = 45cm²
B= [tex] \pi x r x r[/tex] x 1/2
  = 22/7 x 7 x 7 x 1/2
  = 77 cm²
45 + 77= 122cm²

kanan
= p x t x 2
= 18 x 8 x 2
=288 cm²