A) 9 cm
B) 12 cm
C) 16 cm
D) 20 cm
Correct Answer: C
Solution :
(c): \[AB=AC=17\]cm, \[AD\bot BC;AD=15\]cm \[\therefore \] \[BD=DC\] In \[\Delta ABD\] \[BD=\sqrt{A{{B}^{2}}-A{{D}^{2}}}\] \[BD=\sqrt{{{17}^{2}}-{{15}^{2}}}\] = 8 cm \[\therefore \] \[BC=2\times BD=2\times 8\] = 16 cm.You need to login to perform this action.
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