3. Calculate the angles of a
triangle, if they are in the ratio
4: 5: 6: .
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Let the angles of the triangle be 4x,5x and 6x.
Then,
4x+5x+6x=180°
15x=180
x=180/15
x=12
Hence , the angles of the triangle are :
4x=4×12=48°
5x=5×12=60°
6x=6×12=72°
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