if a triangle are in the ratio 4 :5:9, the triange is
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- we know that the sum of all angles of a triangle is equal to 180 degrees, so 4x+5x+9x=180 degrees 18x=180 degrees x=10 so, 4x= 4*10=40, 5x= 5*10=50 and 9x= 9*10=90 so the angles of the triangle are 40 degrees, 50 degrees, and 90 degrees. so the triangle has all the sides unequal. hence, the triangle is a scalene triangle