tolong jawab soalnya 2sampai no 5 pake caranya ya

2.
L segitiga = 1/2 . a . t = 1/2 . 10 . t = 5t cm²
L trapesium = 1/2 x jumlah sisi sejajar x tinggi
                    = 1/2 x (20 + 16) x 6
                    = 1/2 x 36 x 6
                    = 108 cm²

Luas total = L segitiga + L trapesium
148 = 5t + 108
148 - 108 = 5t
40 = 5t
t = 40 / 5
t = 8 cm