The edge of the square is a units long'

1
Tangram Perimeters
The edge of the square is a units long.
Find an edge of a different tile that is a units
long
Find an edge of a tile that is 2 a units long
2b
b
b
a
a
a
2a
2a
The longer edge of the parallelogram is b units
long.
Find an edge of a different tile that is b units
long
Find an edge of a tile that is 2 b units long
2
Tangram Perimeters
3
Tangram Perimeters
What is the perimeter of this pattern?
?
?
a
a
?
a
a
?
?
?
2a
2a
What is this edge?
2a
4
Tangram Perimeters
What is the perimeter of this pattern?
a
a
a
a
2a
2a






10a
2a
5
Tangram Perimeters
And what is the perimeter of this one?
?
2a
?
a
?
?
b
2b
?
a
?
b
6
Tangram Perimeters
And of this one?
2a
a
b
2b





a
b
4a 4b
7
Tangram Perimeters
Work in pairsMake some more patterns with
tangram tiles.Whole edges must meet.
What are the perimeters of your patterns?
What different perimeters can we make?
What is the greatest perimeter?(Remember whole
edges must meet!)
Draw around your patterns to record them.
8
Please put the foam tiles back in their frames,
and all the tiles into their bags!