The measure of JM from the given diagram is 21: Option B is correct.
The point where two lines meet is known as an angle.
From the given diagram, we can see that the horizontal lines are parallel to each other with two transversals.
Given that AB = BC = CD,
AB = ML = 7
BC = KL = 7
CD = JK = 7
The length of JM = JK + KL + LM
JM = 7 + 7 + 7
JM = 21
Hence the measure of JM from the given diagram is 21
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