GCSE Maths Practice: polygons

Question 9 of 10

This question tests properties of irregular polygons.

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\( \begin{array}{l}\text{Which statements are true about irregular polygons?}\end{array} \)

Select all correct options:

\( \text{Sides can be different lengths} \) \( \text{Angles can be different sizes} \) \( \text{All sides must be equal} \) \( \text{Sum of interior angles is still } (n-2) \times 180^\circ \)

Sum formula holds; sides and angles can vary.

Irregular polygons have sides and angles that are not equal. Despite this, the sum of interior angles formula (n-2) × 180° still applies. Recognizing this distinction helps students solve polygon problems, calculate unknown angles, and understand geometric reasoning. Practising irregular polygons improves problem-solving skills, diagram interpretation, and readiness for GCSE exams. Being able to identify what properties remain constant and which can vary is key to mastering polygon geometry.