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ruchika80:
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Step-by-step explanation:
We know that the sum of angles in a triangle is 180 ( angle sum property)
x + 40 + 2x + 20 + 3x = 180
6x + 60 = 180
6x = 180 - 60, 6x = 120
x = 120/6 = 20
x = 20, 2x + 20 = 2(20) + 20 = 40 + 20 = 60
3x = 3(20) = 60
x + 40 = 20 + 40 = 60
It is an equilateral triangle as all angles are equal to 60.
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