help me please, tolong pke cara y

19) a = KL = 44 cm,  t = LM = 58 cm
L = 1/2 x a x t = 1/2 x 44 x 58 = 1276 cm²

20) L = 418 cm², t = 22 cm
L = 1/2 x a x t
a = L x 2 / t = 418 x 2 / 22 = 38 cm