Three of the following four figures are alike in a certain way. Choose the figure that does not belong to the group.
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) →
Look for a line of symmetry (a line that divides the figure into two mirror halves). Three figures have a line of symmetry. Option (3) cannot be divided into two mirror halves in any way, so it is the odd one out.
Option (1) — Incorrect. An octagon: it has a line of symmetry.
Option (2) — Incorrect. A triangle: it has a line of symmetry.
Option (4) — Incorrect. A rectangle: it has a line of symmetry.