Question 29
Diagram NOT accurately drawn
The diagram shows part of a regular n-sided polygon with
an interior angle of
an exterior angle of
Work out the value of n
n=
Edexcel IGCSE Math A Foundation 4.2.D regular polygons
Practise regular-polygon questions by linking each exterior angle to 360 degrees and each interior angle to its supplement.
How this is tested
- Find the number of sides from an exterior angle by dividing 360 degrees.
- Use interior and exterior angle relationships to form and solve equations.
- Calculate n for a regular polygon when the angle information is given algebraically.