multiplicity of triangles solvable purely with the law of sines

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Law of Sines SAA/AAS 2 Angles, 1 Side ASA 2 Angles, 1 Shared Side SAS Cannot be solved w/LOS SSA/ASS The Ambiguous Case 1 0 Geometric Theorems A < 90 Acute A = 90 Equal A > 90 Obtuse a < h a = h a > h Comparison of length a to height h What type of angle is the supplied angle? 0 1 2 a > b a <= b 0 1 a < b a >= b 1 Where 2R = twice the radius of the circle in which the triangle is inscribed Multiplicity of Triangles Solvable Purely with the Law of Sines Law of Sines In a triangle, the ratio of the sine of any angle to the length of the side opposite it is equal across all three angles. OR

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A flowchart that is somewhat useful for learning how to handle the different cases encountered when solving a triangle allowed only the Law of Sines.

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Page 1: Multiplicity of Triangles Solvable Purely with the Law of Sines

Law of Sines

SAA/AAS2 Angles, 1 Side

ASA2 Angles, 1 Shared Side

SASCannot be solved w/LOSSSA/ASS

The Ambiguous Case

11

00G

eometric Theorem

s

A < 90Acute

A = 90Equal

A > 90Obtuse

a < h a = h a > h

Comparison of length a to height h

What type of angle is the supplied angle?

00 11 22

a > ba <= b

00 11

a < ba >= b

11

Where 2R = twice the radius of the circle in which the triangle is inscribed

Multiplicity of TrianglesSolvable Purely with the Law of Sines

Law of Sines

In a triangle, the ratio of the sine of any angle to the length of the side opposite it is equal across all three angles.

OR