The measures of angle of a triangle are x°,(x-20)° ,(x-40)° find the measure of each angle
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Answer:
The sum of all angles in a triangle is 180°
Let A=x°
B=(X-20)
C=x-40
then
x+x-20+x-40=180
3x-60=180
3x=180+60
3x=240
x=80
A=x=80°
B=x-20=60°
C=x-40=40°
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