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In an isosceles triangle, if the unequal angle is twice the sum of the equal angles, then each equal angle is
Let the angles of isosceles triangle be $$\alpha , \alpha , \beta$$
Now, $$\beta = 2(\alpha + \alpha)$$
=> $$\beta = 4 \alpha$$
Also, sum of angles of a triangle is 180°
=> $$2 \alpha + \beta$$ = 180°
=> $$2 \alpha + 4 \alpha$$ = 180°
=> $$\alpha = \frac{180}{6}$$ = 30°
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