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10 cards from this deck
Any triangle, not just right-angled triangles
Two sides and the included angle
All three sides
The angle between two sides
a2=b2+c2−2bccosAa^2 = b^2 + c^2 - 2bc \cos Aa2=b2+c2−2bccosA
cosA=b2+c2−a22bc\cos A = \frac{b^2 + c^2 - a^2}{2bc}cosA=2bcb2+c2−a2
Degree mode
Inverse cosine (cos−1\cos^{-1}cos−1 or arccos)
SAS (Side-Angle-Side)
SSS (Side-Side-Side)
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