1.

1. In figure, if AD -73 m, then find BC604

Answer»

In ∆ ABD,tan(30°) = AD/BD

1/(√3) = 7√3/BD

BD = 7 × 3 cm = 21 cm

In ∆ADC,

tan(60°) = AD/DC

√3 = AD/DC

DC = 7√3/√3

DC = 7 cm

So, BC = BD + DC = 21 cm + 7 cm = 28 cm



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