Triangle Trigonometry

This script helps users understand the properties of triangles. It is based on two laws that we learn in trigonometry: the law of sines and the law of cosines. Assume that we have a triangle with sides of lengths a, b, and c and respective angles A, B and C (where the angle A does not touch the side a, the angle B does not touch the side b, and the angle C does not touch the side c). These laws are as stated as follows:

Law of Sines
a
sin(A)
=
b
sin(B)
=
c
sin(C)
Law of Cosines
c2 = a2 + b2 - 2*a*b*cos(C)

We can use these laws to determine the sides of a triangle given almost any combination of sides and angles of that triangle (the only one we cannot determine properties from is if we are given all three angles, as this leads to many solutions).

The script generates random triangles, with different combinations of sides and angles revealed and the user's job is to try to determine the missing sides.

Show Work


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