Panjang ac= . . . cm

Panjang AC = 4 cm.

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B/ Sin B = a/Sin A
AC/Sin 30° = 4√2/Sin 45°
AC/(1/2) = 4√2/(1/2√2)
AC x 2 = 4 x 2
AC = 4
atau AC = a x SiB /Sin A
= 4√2 x Sin 30° : Sin 45°
= 4√2 x 1/2 : (1/2 √2)
= 4