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a = 5
KL = ZY = 2a +2 = 2(5) + 2 = 12
XZ = √(XY)²+(ZY)²= √(5²+12²) = 13
ML = XZ = 13
3b-8 = 13
3b = 13+8
3b = 21
b = 21/3
b = 7
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