Question

The angle of a triangle are (x-10),(x-20) and (1/2x-10). find the value of x.

Answer 1

by angle sum property of triangle
sum of all angles =180
$x - 10 + x - 20 + \frac{x}{2} - 10 = 180 \\ 2x + \frac{x}{2} = 220 \\ 5x = 440 \\ x = 88 \\ angles \: are \: \\ 78 \: \: \: 68 \: \: \: \: 34$



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