luas bangun di atas adalah... cm2.

semoga bermanfaat,,
maaf kalo salah 
L 1 = 1/2 x (20+15) x 10
      = 1/2 x 25 x 10
      = 125
L2 = 1/2 x (30+20) x 10
     = 1/2 x 50 x 10
     = 250
L seluruhnya = 125 + 250 = 375

L1 = 1/2 × (15 + 20) × 10 = 1/2 × 35 × 10 = 175 cm^2
L2 = 1/2 × (20+15+15) × 10 = 1/2 × 50 × 10 = 250 cm^2
L total = 175 + 250 = 425 cm^2
^ artinya pangkat