This PDF a set of preset shapes to help children explore perimeter (and area). There are 5 sets of shapes, each one presented with three options on a grid of centimetre squares plus addition sets of triangles and parallelograms.
This a set of preset shapes to help children explore perimeter (and area). There are 5 sets of shapes, each one presented with three options on a grid of centimetre squares:
Set 1: Random Shapes
Set 2: Smaller Rectangles
Set 3: Larger Rectangles
Set 4: Rectilinear Shapes
Set 5: Rectilinear Crosses
Option 1: Internal squares visible
Option 2: Internal squares invisible
Option 3: No centimetre square grid
The pack also includes one page with irregular shapes on a grid of centimetre squares.
Pages 18-23 feature Triangles & Parallelograms
1: Print, laminate and cut into individual cards
2: Print and cut out into strips for use in display.
Ideas for Use:
Choose the appropriate sheets to fit your objective and the achievement levels of your children.
Option 1: Children use the internal squares to calculate the perimeter (or area) of each shape.
Option 2: Children calculate the perimeter (or area) by using the external squares and reasoning.
Option 3: Children calculate area through measurement and reasoning.