See what we can offer to your school
"SimpleStudy just makes sense...”
Get the best plan for your school
12 cards from this deck
Unknown sides or angles in any triangle
Two sides + included angle OR all three sides known
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; use to find a side length
Side-Side-Side; use to find an angle
Lowercase = side lengths; Uppercase = opposite angles
b2=a2+c2−2accosBb^2 = a^2 + c^2 - 2ac \cos Bb2=a2+c2−2accosB
Pythagoras with an extra correction term
Forgetting to square root the result
An obtuse angle (greater than 90°)
Any triangle: acute, obtuse, or right-angled
Select your subjects, and get access to A+ resources today.