Geometryhard · Past Paper
In the figure, if AB || CD and CD || EF, and y:z = 3:7, find x.
A54
B126
C18
D108
✓ Correct Answer: B — 126
x = z (alternate angles). x + y = 180 (co-interior). z + y = 180. 7k + 3k = 180; k = 18. z = 7*18 = 126. x = 126.
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