GCSE Maths Practice: polygons

Question 5 of 10

This question asks students to find the exterior angle of a regular dodecagon (12 sides).

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\( \begin{array}{l}\text{What is the exterior angle of a regular dodecagon (12 sides)?}\end{array} \)

Choose one option:

Divide 360° by number of sides to get each exterior angle.

In any regular polygon, the sum of exterior angles is always 360°, regardless of the number of sides. To find the measure of each exterior angle, divide 360° by the number of sides. For a dodecagon (12 sides), 360 ÷ 12 = 30°. Understanding exterior angles is crucial for solving polygon problems, calculating missing angles, and reasoning about geometric diagrams in GCSE. Practising these calculations helps students develop quick and accurate methods for geometry problems and reinforces the relationship between interior and exterior angles.