AB = 4, CD = 7
2*AB = 8
1*CD = 7
2*AB - CD = 1
2*(4) - 7 = 1
8 - 7 = 1
You are given two segments, LineAB with AB = 4 and LineCD with CD = 7. Explain how you could only use the congruent-segments construction to construct LineEF with EF = 1.
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