Пусть <1=4х; <2=3х; <1+<2=180°; 4х+3х=180; 7х=180; х=180/7=25 5/7; <1=4х=4*180/7=720/7=102 6/7°; <2=3х=3*180/7=540/7=77 1/7°.
Пусть <1=4х; <2=3х; <1+<2=180°; 4х+3х=180; 7х=180; х=180/7=25 5/7; <1=4х=4*180/7=720/7=102 6/7°; <2=3х=3*180/7=540/7=77 1/7°.