0580 · Notes & worked examples
Check a final answer, then explain the reasoning on paper. Guest progress stays in this browser; an account saves future checks without overwriting your first result.
Recall
Maths4U Original · Short practice
A convex regular polygon has 8 sides.
Find each exterior angle in degrees.
Enter one exact number or fraction unless the question specifies rounding. If it asks for a coefficient of π, enter that coefficient only. Give full reasoning separately for written problems.
Fresh review variant
Maths4U Original · Short practice
A convex regular polygon has 9 sides.
Find each exterior angle in degrees.
Enter one exact number or fraction unless the question specifies rounding. If it asks for a coefficient of π, enter that coefficient only. Give full reasoning separately for written problems.
Method
Maths4U Original · Short practice
A convex regular polygon has 9 sides.
Find each interior angle in degrees.
Enter one exact number or fraction unless the question specifies rounding. If it asks for a coefficient of π, enter that coefficient only. Give full reasoning separately for written problems.
Fresh review variant
Maths4U Original · Short practice
A convex regular polygon has 10 sides.
Find each interior angle in degrees.
Enter one exact number or fraction unless the question specifies rounding. If it asks for a coefficient of π, enter that coefficient only. Give full reasoning separately for written problems.
Apply
Maths4U Original · Short practice
A convex regular polygon has 10 sides.
Find the sum of the interior angles in degrees.
Enter one exact number or fraction unless the question specifies rounding. If it asks for a coefficient of π, enter that coefficient only. Give full reasoning separately for written problems.
Fresh review variant
Maths4U Original · Short practice
A convex regular polygon has 11 sides.
Find the sum of the interior angles in degrees.
Enter one exact number or fraction unless the question specifies rounding. If it asks for a coefficient of π, enter that coefficient only. Give full reasoning separately for written problems.
Check understanding
Maths4U Original · Short practice
A convex regular polygon has 11 sides.
How many triangles result when diagonals from one vertex triangulate this convex polygon?
Enter one exact number or fraction unless the question specifies rounding. If it asks for a coefficient of π, enter that coefficient only. Give full reasoning separately for written problems.
Fresh review variant
Maths4U Original · Short practice
A convex regular polygon has 12 sides.
How many triangles result when diagonals from one vertex triangulate this convex polygon?
Enter one exact number or fraction unless the question specifies rounding. If it asks for a coefficient of π, enter that coefficient only. Give full reasoning separately for written problems.