Question

FIND THE LENGHT OF AD

Answer 1

Hi,

Explanation:

mes ∠ABD=90°-48°=42°

mes ∠ADC=180°-42°=138°

mes ∠DCA=180°-138°-21°=21°

using law of sin:

`\frac{sin(\angle{ADC)} }{AC} =\frac{sin(\angle{DCA}) }{AD} \\\\AD=(sin(21^o) *84)/(sin(138^o) ) =44.988089...m\approx{44.99\ m}`