Tolong bisa jawab yang ada garis kotak kotak no 10

L 1 = a×t = 4×5 = 20
L 2 = 1/2 × a× t = 1/2 ×4×2 = 4
L 3 = 1/2 × (a+b) × t = 1/2 × (4+6) × 3 = 15

L total = L1+ L2 + L3 = 20 + 4 + 15 = 29

maaf kalau salah