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What is a polygon? Polygons are many-sided figures, with sides that are line segments. Polygons are named according to the number of sides and angles they have. Can be “regular” – all sides and all angles are equal to each other
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Polygons are many-sided figures, with sides that are line segments. Polygons are named according to the number of sides and angles they have.
Can be “regular” – all sides and all angles are equal to each other
All sides are congruent
All angles are congruent
Not all sides are congruent
Not all angles are congruent
5 sides5 angles5 vertices
Regular polygon
Irregular polygon
6 sides6 angles6 vertices
Regular polygon
Irregular polygon
7 sides7 angles7 vertices
Regular polygon
Irregular polygon
8 sides8 angles8 vertices
Regular polygon
Irregular polygon
9 sides9 angles9 vertices
Irregular polygon
Regular polygon
10 sides10 angles10 vertices
Irregular polygon
Regular polygon
Two sides of equal length
Three acute angles Sum of angles =
180°
All sides equal length
Three acute angles Sum of angles =
180° Is a regular
polygon
No sides are equal No angles are
equal May have obtuse
angle Sum of angles =
180 °
Has one 90 ° angle
Sum of all angles 180 °
A triangle having three acute angles.
Sum of angles = 180°
A triangle having an obtuse angle.
Sum of all angles 180 °