the angle of triangleare in ration 4:5:9. find degree measures of each angle of the triangle .
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Let the measures of angle of triangle be 4x,5x and 9x.
Equation so formed : 4x+5x+9x = 180° (Sum of interior angles of a triangle is 180°)
=> 18x = 180°
=> x = 180/18 °
=> x = 10°
Now; Angle 1 = 4x = 4×10° = 40°
Angle 2 = 5x = 5×10° = 50°
Angle 3 = 9x = 9×10° = 90°
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