Question and Answers Forum

All Questions      Topic List

UNKNOWN Questions

Previous in All Question      Next in All Question      

Previous in UNKNOWN      Next in UNKNOWN      

Question Number 113807 by deepraj123 last updated on 15/Sep/20

In any △ABC, if the angles are in   the ratio 1 : 2 : 3, then the ratio of  corresponding sides is

$$\mathrm{In}\:\mathrm{any}\:\bigtriangleup{ABC},\:\mathrm{if}\:\mathrm{the}\:\mathrm{angles}\:\mathrm{are}\:\mathrm{in}\: \\ $$$$\mathrm{the}\:\mathrm{ratio}\:\mathrm{1}\::\:\mathrm{2}\::\:\mathrm{3},\:\mathrm{then}\:\mathrm{the}\:\mathrm{ratio}\:\mathrm{of} \\ $$$$\mathrm{corresponding}\:\mathrm{sides}\:\mathrm{is} \\ $$

Answered by bemath last updated on 15/Sep/20

∠A = k ,∠B=2k ,∠C=3k  ⇒ 6k=180° →k=30°   (a/(sin 30°))=(b/(sin 60°))=(c/(sin 90°))  (a/(1/2))=(b/((1/2)(√3)))=(c/1) →  { ((b=(1/2)(√3) c)),((a=(1/2)c)) :}  a : b : c = (1/2) : (1/2)(√3) : 1                  = 1 : (√3) : 2

$$\angle{A}\:=\:{k}\:,\angle{B}=\mathrm{2}{k}\:,\angle{C}=\mathrm{3}{k} \\ $$$$\Rightarrow\:\mathrm{6}{k}=\mathrm{180}°\:\rightarrow{k}=\mathrm{30}° \\ $$$$\:\frac{{a}}{\mathrm{sin}\:\mathrm{30}°}=\frac{{b}}{\mathrm{sin}\:\mathrm{60}°}=\frac{{c}}{\mathrm{sin}\:\mathrm{90}°} \\ $$$$\frac{{a}}{\frac{\mathrm{1}}{\mathrm{2}}}=\frac{{b}}{\frac{\mathrm{1}}{\mathrm{2}}\sqrt{\mathrm{3}}}=\frac{{c}}{\mathrm{1}}\:\rightarrow\:\begin{cases}{{b}=\frac{\mathrm{1}}{\mathrm{2}}\sqrt{\mathrm{3}}\:{c}}\\{{a}=\frac{\mathrm{1}}{\mathrm{2}}{c}}\end{cases} \\ $$$${a}\::\:{b}\::\:{c}\:=\:\frac{\mathrm{1}}{\mathrm{2}}\::\:\frac{\mathrm{1}}{\mathrm{2}}\sqrt{\mathrm{3}}\::\:\mathrm{1}\: \\ $$$$\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:=\:\mathrm{1}\::\:\sqrt{\mathrm{3}}\::\:\mathrm{2} \\ $$$$ \\ $$

Terms of Service

Privacy Policy

Contact: info@tinkutara.com