Respuesta :

All angkles together are allways 180°

so 19°+55°=74°

180°-74°=106°

C has to be 106°


sina=a/11

sin55=0.819

a=11*0.819

=>a=9

sin19°=b/11

0,33=b/11

0,33*11=3,6

=> b=3,6

Otras preguntas