From: Goniometer-apps in hand surgery and their applicability in daily clinical practice
Angle
Color of the Edge
Greek Letter
Value
∢ADE,ABE
Red
α
90,8°
∢BAE,BCE
Blue
β
105,2°
∢CBE,CDE
Green
γ
145,1°
∢DCE,DAE
Yellow
δ
79,4°