Question Number 162209 by Tawa11 last updated on 27/Dec/21
Commented by Rasheed.Sindhi last updated on 27/Dec/21
$$\mathrm{Q}#\mathrm{1} \\ $$$$\mathrm{C}.\:\mathrm{65} \\ $$$$\mathrm{Q}#\mathrm{2} \\ $$$$\mathrm{Which}\:\mathrm{is}\:\alpha\:\:\mathrm{angle}\:\mathrm{in}\:\mathrm{the}\:\mathrm{diagram}? \\ $$
Commented by Tawa11 last updated on 27/Dec/21
$$\mathrm{Thanks}\:\mathrm{sir}.\:\mathrm{Just}\:\mathrm{show}\:\mathrm{working}\:\mathrm{for}\:\mathrm{number}\:\mathrm{1}.\:\mathrm{I}\:\mathrm{will}\:\mathrm{sort}\:\mathrm{number}\:\mathrm{2}\:\mathrm{out}. \\ $$$$\mathrm{God}\:\mathrm{bless}\:\mathrm{you}\:\mathrm{sir}. \\ $$
Answered by Rasheed.Sindhi last updated on 28/Dec/21
Commented by Rasheed.Sindhi last updated on 28/Dec/21
$$\bigtriangleup\mathrm{ABC}: \\ $$$$\angle\mathrm{BAC}=\mathrm{90}−\mathrm{20}=\mathrm{70} \\ $$$$\angle\mathrm{BCA}=\mathrm{45}\: \\ $$$$\varphi+\mathrm{70}+\mathrm{45}=\mathrm{180} \\ $$$$\varphi=\mathrm{180}−\mathrm{115}=\mathrm{65} \\ $$$$\varphi+\angle\mathrm{BAC}+\angle\mathrm{BCA}=\mathrm{180} \\ $$
Commented by Tawa11 last updated on 28/Dec/21
$$\mathrm{God}\:\mathrm{bless}\:\mathrm{you}\:\mathrm{sir}.\:\mathrm{I}\:\mathrm{understand}\:\mathrm{it}\:\mathrm{now} \\ $$