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  4. I is the incentre of an isosceles triangle ABC. If angle B =80°, then the value of angle AIC is

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Q. I is the incentre of an isosceles triangle $ABC$. If $\angle B =80^{\circ}$, then the value of $\angle AIC$ is

Geometry

Solution:

image
$\angle AIC =90^{\circ}+\frac{\angle B}{2}=90^{\circ}+40^{\circ}=130^{\circ}$