Question

vă rog repede dau coroană​

Answer 1

$A+B+C=180\\\\C=20\\\\A=4C= > A=4*20= > A=80\\\\80+B+20=180\\\\B=180-100= > B=80 grade$

Answer 2

$\it m(\angle A)=4\cdot20^o=80^o\\ \\ m(\angle B)=180^o-(20^o+80^o)=80^o$