Set each sides of a triangle as a fraction, and set both triangles equal to each other.
Let side XZ's measurement = x
Set the sides as fractions equal to each other.
3/4 = x/8
Cross multiply
3/4(4)(8) = x/8(8)(4)
3(8) = x(4)
Simplify
24 = 4x
Isolate the x. Divide 4 from both sides
24/4 = 4x/4
x = 24/4
x = 6
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(C) 6 units is your answer
hope this helps