Question

faceti vărog ex 20 repede vărog

Answer 1

Răspuns:

a) <AOB=136* iar <BOC=44*

b) <AOB=68* iar <BOC=112*

Explicație pas cu pas:

<AOB+<BOC=180*

a) 2x+20*+x-14*=180* => 3x+6*=180*

3x=180*-6*

3x=174*

X=174*/3* => x=58*

<AOB=2•58*+20*=116*+20*

<AOB=136*

<BOC=58-14 => <BOC=44*

b) 3x-28*+X+80*=180*

4x+52*=180*

4x=180*-52*

4x=128* =>x=128*/4 => x=32*

<AOB=3•32*-28*=96*-28* => < AOB=68*

<BOC=32*+80* => <BOC=112*

O zi senina!