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8 cards from this deck
Two sides and the included angle
The angle between two sides
a2=b2+c2−2bc⋅cosAa^2 = b^2 + c^2 - 2bc \cdot \cos Aa2=b2+c2−2bc⋅cosA
The angle opposite side aaa
All three lengths of the triangle
cosA=b2+c2−a22bc\cos A = \frac{b^2 + c^2 - a^2}{2bc}cosA=2bcb2+c2−a2
Use inverse cosine (cos−1\cos^{-1}cos−1)
Square root both sides
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