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Boundaries of the Inguinal Triangle (also called Hesselbach Triangle) can be remembered easily with this mnemonic
RIP
R = lateral border of the rectus abdominis makes the medial border of the triangle
I = Inferior epigastric vessels making the superolateral border of the triangle
P = Inguinal ligament (also called Poupart's ligament)
This will help us remember that the direct inguinal hernia rip through the triangle
Here's a grey's anatomy illustration
Copyright Notice: this image has fallen in the public domain because it's copyright has expired
Note that in the illustration we also see the femoral ring below the inguinal ligament bound medially by the lacunar ligament (see related thread).
RIP
R = lateral border of the rectus abdominis makes the medial border of the triangle
I = Inferior epigastric vessels making the superolateral border of the triangle
P = Inguinal ligament (also called Poupart's ligament)
This will help us remember that the direct inguinal hernia rip through the triangle
Here's a grey's anatomy illustration

Copyright Notice: this image has fallen in the public domain because it's copyright has expired
Note that in the illustration we also see the femoral ring below the inguinal ligament bound medially by the lacunar ligament (see related thread).