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CBSE Class 10 Answered

In triangle ABC, AD is perpendicular to BC, angles B and C are of measures 30 and 60 respectively, if AD=7m, then find the value og BC.

Asked by godboletanaya | 24 Dec, 2021, 11:08: AM
Expert Answer
tan space 30 equals AD over BD
rightwards double arrow BD equals 7 square root of 3
And comma space tan space 60 equals AD over DC
rightwards double arrow DC equals fraction numerator 7 over denominator square root of 3 end fraction
BC equals BD plus DC equals 7 square root of 3 plus fraction numerator 7 over denominator square root of 3 end fraction equals fraction numerator 28 over denominator square root of 3 end fraction space straight m
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