Tangram e Geoplano on-line

Tangram
http://nlvm.usu.edu/en/nav/frames_asid_268_g_1_t_3.html?open=activities
http://www.atractor.pt/mat/numeros/quadrados/TanApp/index.html


Geoplanohttp://www.eb1-recovelas.rcts.pt/aplicacoes/geoplano/geoplano/geoplano.htm
http://nlvm.usu.edu/en/nav/frames_asid_277_g_1_t_3.html
http://nlvm.usu.edu/en/nav/frames_asid_285_g_4_t_3.html (geoplano circular)