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12 questions from this quiz
When you know two sides & included angle
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
Side-Angle-Side
Side-Side-Side
"SAS for sides, SSS for angles"
Lengths of the sides
b2=a2+c2−2accosBb^2 = a^2 + c^2 - 2ac \cos Bb2=a2+c2−2accosB
Pythagoras with a correction term
Forgetting to square root the result
An obtuse angle (>90°)
29.996
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