Home › AP EAPCET (Engineering) › Mathematics › Properties of Triangles › When all three sides are given, which rule finds…
When all three sides are given, which rule finds the angles directly?
ALaw of tangents
BMollweide rule
CLaw of sines
DLaw of cosines
Answer & Solution
Correct answer: D. Law of cosines
Rearranging c squared = a squared + b squared - 2ab cos C gives each angle from the three sides.
Related questions
Which fact is true of every triangle?Why can a triangle not be fixed when only its three angles are given?Why is the law of cosines safer for finding an angle?Two sides a, b and the angle between them are known. Which rule gives the difference of thThe law of tangents is mathematically equivalent to which other triangle law?Euclid's Proposition II.12 concerns the square on the side opposite which kind of angle?The excentral triangle has its sides on which lines?When two sides and a non-included angle are given, the triangle may not be unique. What is