# The angles of a t

Given that,

The angles of the triangle are (x – 40o), (x – 20o) and ( – 10o)

We know that,

Sum of all angles of triangle is 180o.

Therefore,

x – 40o + x – 20o + – 10o = 180o

2x + – 70o = 180o

= 250o

5x = 250o * 2

5x = 500o

x = 100o

Therefore, x = 100o

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