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## Answers

x-40+x-20+1/2x-10=180°

2x+1/2x-70=180°

5/2x=180°+70

5/2x=250°

x=250°*2/5

therefore, x=100

And the values of the angles are:

100-40=60

100-20=80

1/2*100-10=40

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x-40+x-20+1/2x-10=180°

2x+1/2x-70=180°

5/2x=180°+70

5/2x=250°

x=250°*2/5

therefore, x=100

And the values of the angles are:

100-40=60

100-20=80

1/2*100-10=40