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Ruler Postulate and Segment Addition Postulate

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Word Problem--Find BC
Teacher Contributed
AC¯¯¯¯¯$\overline{AC}$ is a line segment with point B$B$ existing somewhere between points A$A$ and C$C$. If the measure of AC¯¯¯¯¯$\overline{AC}$ is 51, and the measure of AB¯¯¯¯¯$\overline{AB}$ is 24, then what is the measure of BC¯¯¯¯¯$\overline{BC}$?
qid: 100026