The half-angle at a vertex of the isosceles triangle formed by joining the centre of a regular $n$-gon to two adjacent v

Question

The half-angle at a vertex of the isosceles triangle formed by joining the centre of a regular $n$-gon to two adjacent vertices is —

Accepted Answer

$90° - \dfrac{180°}{n}$

Answer

$\dfrac{180°}{n}$

Answer

$\dfrac{360°}{n}$

Answer

$90° - \dfrac{90°}{n}$

The half-angle at a vertex of the isosceles triangle formed by joining the centre of a regular nnn-gon to two adjacent vertices is —