L = ½ x WY x ZX
L = ½ x 9 x 12
L = ½ x 108
L = 54 cm²
I hope this help
Answer:
Step-by-step explanation:
(a) {(1, 2), (2,4), (3,6), (4 , 8), (1,3), (3,5), (5,7)}
add them