In a isosceles triangle if one of its equal angle is 80 degrees then third angle is
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Isosceles ∆= 2 equal sides
1 equal angle is 80°(given)
so there will be one more angle with 80°
80+80+x=180(sum of all interior angles of a triangle= 180°)
160+x=180
x=180-160=20
so,the remaining/3rd angle = 20°
hope it helps
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