Brincando e aprendendo com o Tangram

Synopsis: Chinese Tangram puzzle is a head consisting of seven pieces (called tans), which
means "seven boards of wisdom": five triangles (two large, one medium and two
small), a square and a parallelogram. The goal is to assemble figures,
always using the seven pieces.
Source: Secretariat of State of Paraná.
URL: http://www.diaadiaeducacao.pr.gov.br/portals/pde/arquivos/1725-6.pdf