In triangle ABC, AD perpendicular to BC, AB = 7.5 cm, AC = 10 cm, AD = – InterviewSolution

1.	In triangle ABC, AD perpendicular to BC, AB = 7.5 cm, AC = 10 cm, AD =6 cm.Find BC.Show that angle BAC =90°.
Answer» -STEP EXPLANATION:in TRIANGLE abdby PYTHAGORAS theorm7.5×7.5=6×6+BD×BD56.25=36+BD220.25=BD2BD=4.5un triangle acd10×10=6×6+ DC2100=36+DC2√64=DCBC=8BC+DC=8+4.5= 12.5=BC

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