(C) $144^{\circ}$ [Hint: Each exterior angle $=\frac{360^{\circ}}{10}=36^{\circ}$ So, each interior angle $\left.=\left(180^{\circ}-36^{\circ}\right)=144^{\circ}\right]$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.