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A circle of radius 4 cm is inscribed in DeltaABC, which touches side BC at D. If BD = 6 cm, DC = 8 cm then |
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Answer» the triangle is necessarily acute angled `rArr "tan"(B)/(2) "tan"(C)/(2) = (s-a)/(s) = (1)/(3)` `rArr 2s = 3A = 42` `:. Delta = RS = 84 cm^^(2)` THUS, `"tan"(A)/(2), "tan"(B)/(2), "tan"(C)/(2)` all are less than 1 Hence, all angles of the triangle are acute |
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