Question Number 182866 by Shrinava last updated on 15/Dec/22
Answered by HeferH last updated on 15/Dec/22
$${if}\:{CD}\:\parallel\:{AB}\:: \\ $$$$\:\mathrm{8}{a}\:−\:\mathrm{60}\:=\:\mathrm{180}\: \\ $$$$\:{a}\:=\:\frac{\mathrm{240}}{\mathrm{8}}\:=\:\mathrm{30}° \\ $$