Question Number 183551 by HeferH last updated on 26/Dec/22

Answered by CrispyXYZ last updated on 27/Dec/22

$${LF}={BJ},\:{LB}={FJ} \\ $$$$\Rightarrow{BLFJ}\:\mathrm{is}\:\mathrm{a}\:\mathrm{parallelogran} \\ $$
Commented by CrispyXYZ last updated on 27/Dec/22

Commented by HeferH last updated on 27/Dec/22

$$\left.{thank}\:{you}\::\right) \\ $$