Two-Dimensional Figures
Polygons
A polygon is a plane shape with straight sides.
Polygons are 2-dimensional shapes.
They are made of straight lines, and the shape is "closed" (all the lines connect up).
A polygon is a plane shape with straight sides.
Polygons are 2-dimensional shapes.
They are made of straight lines, and the shape is "closed" (all the lines connect up).
Types of Polygons
Regular or Irregular
If all angles are equal and all sides are equal, then it is regular, otherwise it is irregular
Regular or Irregular
If all angles are equal and all sides are equal, then it is regular, otherwise it is irregular
Regular Polygons
Triangles
We classify triangles by 2 of their characteristics-length of sides and angle measure.
Length of Sides
Angle Measures
Videos
Interactives/Games
Practice/Assessment
Quadrilaterals
A quadrilateral is a polygon with 4 sides.
We classify quadrilaterals by their properties.
We classify quadrilaterals by their properties.
Properties:
How many pairs of opposite sides are parallel?
Are there any right angles?
Which sides have equal length?
How many pairs of opposite sides are parallel?
Are there any right angles?
Which sides have equal length?