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9. In AABC, AD L BC. Find the lengthof BC.13 cm12 cm 15 cmFig. 10.36

Answer»

in ABD D=90So DC=root(225-144)=root(81)=9in ABD D=90so BD=root(169-144)=root(25)=5so BC=BD+DC=9+5=14



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