The angles of a rectangle are 3x°, (2x+20)° and (5x-40)° find the angles
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the sum of all angles of rectangle is 360°.
suppose one remaining angle is x .
so, 3x°+(2x+20)°+(5x-40)°+x=360°
3x°+2x+20°+5x-40°+x=360°
11x-20°=360°
11x = 360°-20°
11x= 340
x= 30.9
suppose one remaining angle is x .
so, 3x°+(2x+20)°+(5x-40)°+x=360°
3x°+2x+20°+5x-40°+x=360°
11x-20°=360°
11x = 360°-20°
11x= 340
x= 30.9
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