Choose the figure which is different from the other three.
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) →

Look for a line of symmetry (a line that divides the figure into two mirror halves). Three figures have a line of symmetry. Option (2) cannot be divided into two mirror halves in any way, so it is the odd one out.

Option (1) — Incorrect. A pentagon: it has a line of symmetry.
Option (3) — Incorrect. A heptagon (seven-sided figure): it has a line of symmetry.
Option (4) — Incorrect. An octagon: it has a line of symmetry.