Question Number 78042 by $@ty@m123 last updated on 13/Jan/20
Answered by mr W last updated on 13/Jan/20
Commented by mr W last updated on 13/Jan/20
$${x}=\mathrm{70}−\mathrm{40}=\mathrm{30}° \\ $$
Commented by $@ty@m123 last updated on 13/Jan/20
$${Thank}\:{you}\:{very}\:{much}. \\ $$
Commented by $@ty@m123 last updated on 20/Feb/20
$${See}\:{also}\:{Q}.\:{No}.\mathrm{61347} \\ $$$$\&\:\mathrm{43728} \\ $$