Question: In the diagram, WX(vector) = a, WY(vector) = b and WZ(vector) = c. It is given that XY(vector) = YZ(vector). Prove that a + c

In the diagram, WX(vector) = a, WY(vector) = b and WZ(vector) = c. It is given that XY(vector) = YZ(vector). Prove that a + c = 2b.


X a b W Y Z

X a b W Y Z

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