Question

Vă rogg!! DAU COROANA​

Answer 1

Perimetru= AB+BC+CD+DA= 4AB

4AB= 56/:4,

AB= 14

AB=BC= AC=14, rezulta ∆ ABC echilateral, deci

<ABC= 60° (< B)

<BAD =120 (<A)

<B= <D= 60°

<A=<C= 120°