GCSE Maths Practice: polygons

Question 6 of 10

This question asks students to find the sum of interior angles for a 15-sided polygon.

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\( \begin{array}{l}\text{What is the sum of the interior angles of a 15-sided polygon?}\end{array} \)

Choose one option:

Subtract 2 from the number of sides, multiply by 180° to get sum of interior angles.

To find the sum of interior angles for any polygon, use the formula (n-2) × 180°, where n is the number of sides. For a 15-sided polygon, (15-2) × 180° = 13 × 180 = 2340°. Knowing this formula is essential for solving polygon problems, calculating missing angles, and understanding geometric relationships in diagrams. Practising this calculation helps students handle more complex polygons efficiently and accurately in GCSE exams and real-world applications like architectural design.