+,-

+ = + =

- = - =

Kawas, 2005 Triangle Card Template 1 tkawas@mathwire.com

+,-

+,-

Kawas, 2005 Triangle Card Template 2 tkawas@mathwire.com

x = x =

= =

x,

Kawas, 2005 Triangle Card Template 3 tkawas@mathwire.com

x,

x,

Kawas, 2005 Triangle Card Template 4 tkawas@mathwire.com