plissssssss tolong jawab pertayaan ku pilsssssss banget

5) L = ½ × (a + b) × t
660 = ½ × (a + 22) × 33
660 ÷ ½ = (a + 22) × 33
1320 ÷ 33 = a + 22
40 = a + 22
a = 40 - 22 = 18