← 4.1 Geometrical Constructions
Angles inside a polygon
Mathematics · Grade 8 · about 40 minutes
Splitting a polygon into triangles to get the interior angle sum, in degrees and in right angles.
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- 7 sections of explanation, worked examples and diagrams
- 1 practice task with hints and worked answers
- A quiz that marks itself as you go
- Your progress kept across every subject you take
Other lessons in this sub-strand
- Drawing parallel lines
- Drawing perpendicular lines
- Dividing a line proportionally
- Angles inside a polygon
- Exterior angles and the number of sides
- Constructing an equilateral triangle and a square
- Constructing a regular pentagon
- Constructing a regular hexagon
- Constructing irregular polygons
- The circle through the vertices of a triangle
- The circle touching the sides of a triangle
- Patterns with circles and polygons