Triangle (3 sides) - 180°, Quadrilateral (4 sides) - 360°, Pentagon (5 sides) - 540°, Hexagon (6 sides) - 720°, Heptagon (7 sides) - 900°, Octagon (8 sides) - 1080°, Nonagon (9 sides) - 1260°, Decagon (10 sides) - 1440°, Undecagon (11 sides) - 1620°, Dodecagon (12 sides) - 1800°,

1.4 Geometrical reasoning - Angles in polygons - Sum of interior angles

Leaderboard

Visual style

Options

Switch template

Continue editing: ?