The angles of a triangle are x,yand 40°.the difference between the the two angles x and yis 30°.find x and y?
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sum of all angles of a triangle=180°
x+y+40°=180° and..........(1)
x-y=30°
x=y+30°
substitude in above equation no.1
y+30°+y+40°=180°
2y+70°=180°
y=55°
substitude y=55° in equation no.1
x+55°+40°=180°
x=180°-95°
x=85°
x+y+40°=180° and..........(1)
x-y=30°
x=y+30°
substitude in above equation no.1
y+30°+y+40°=180°
2y+70°=180°
y=55°
substitude y=55° in equation no.1
x+55°+40°=180°
x=180°-95°
x=85°
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