Question Number 156055 by otchereabdullai@gmail.com last updated on 07/Oct/21
Answered by mr W last updated on 07/Oct/21
Commented by mr W last updated on 07/Oct/21
$$\angle{POR}=\mathrm{2}\angle{PQR}=\mathrm{2}×\mathrm{72}=\mathrm{144}° \\ $$$$\angle{OPS}+\angle{POR}=\mathrm{180}° \\ $$$$\Rightarrow\angle{OPS}=\mathrm{180}°−\mathrm{144}°=\mathrm{36}° \\ $$
Commented by otchereabdullai@gmail.com last updated on 07/Oct/21
$$\mathrm{Thanks}\:\mathrm{a}\:\mathrm{lot}\:\mathrm{prof}\:\mathrm{W}\: \\ $$
Commented by Tawa11 last updated on 08/Oct/21
$$\mathrm{nice}\:\mathrm{sir} \\ $$