Question Number 191307 by cortano12 last updated on 22/Apr/23
Answered by HeferH last updated on 22/Apr/23
$$\mathrm{60}°\:+\:\mathrm{90}°\:+\:?\:=\:\mathrm{180}° \\ $$$$\:?\:=\:\mathrm{30}° \\ $$
Commented by AROUNAMoussa last updated on 23/Apr/23
$${Salut}\:{monsieur}\:! \\ $$$${Veillez}\:{permettre}\:\grave {{a}}\:{vos}\:{jeunes}\:{que}\:{je}\:{fais}\:{partir}\:{de}\:{retenir}\:{quelque}\:{chose} \\ $$$${Mercie}\:{pour}\:{la}\:{compr}\acute {{e}hension}\:! \\ $$