In an isosceles triangle, each base angle is four times of its vertical angle. Find all the angles of a triangle.
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It is iscocels traingle therefore base angles are equal therefore 4x base angles
now by Angle sum property of triangle
4x + 4x + y = 180
8x + y = 180
now by Angle sum property of triangle
4x + 4x + y = 180
8x + y = 180
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