Question

{D ;A}i. p. { 1,(6) ; 2,5 }
A B,C,D=? dau 100 puncte​

Answer 1

{D ;A} i. p. { 1,(6) ; 2,5}

ABCD paralelogram =>  m(<A)+<(D)=180 si <A=<C; <B=<D

D•1,(6)=A•2,5=k

D(16-1)/9=A•5/2=k

D•5/3=A•5/2=k

A=3k/5 si D=2k/5

3k/5+2k/5=180°

5k/5=180° => k=180°

=> m(<A)=m(<C)=3•180°/5=108°

m(<D)=m(<B)=2•180°/5=72°