Tentukan luas trapesium berikut. Tolong dibantu ya guys. Makasih

gambar 1 =

( a + b ) × 1/2 × t
( 6 + 12 ) × 1/2 × 5
18 × 1/2 × 5
9 × 5 = 45 cm

gambar 2 =

5^2 = x^2 + 3^2
25 = x^2 + 9
x^2 = 25 - 9 = 16
x = akar dari 16 = 4 cm
tinggi = 4cm

( 12 + 15 ) × 1/2 × 4
27 × 2 = 54 cm