Question

The area of a trapezium is 156cm². If one of the parallel side is 9cm and the distance between them is 12 cm. Find the length of other parallel side.​

Answer 1

Answer:

area of trap. = 1/2 (sum of parallel sides) × height

156 = 1/2 (9+a) × 12

156×2/1 = (9+a)×12

312 = (9+a) ×12

312/12 = 9+a

26 = 9+a

26-9= a

17 =a

length of other parallel side is 17cm