16√2cm
8√2cm
4√2cm
22cm
Correct answer is C
yzx + 105o + 30o = 180o
yzx = 180 - 155 = 45o
yzsin30o=8sin45o
yz = 8sin30sin45
= 8(12)=81×12×√21
= 4 ÷ 1√2
= 4√2cm
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