“SSA” means side, side, angle.
“SSA” is used when two sides and one angle of a triangle are given and we want to find the missing side angles. Consider the triangle \triangle ABC with the side a, b and c and angle \alpha, \beta and \gamma.We can observe that we are given the three sides a, b and one angle. Therefore the figure illustrates a triangle combination which is known as a SSA triangle.
Step 1: Calculate the largest angle by using the Law of Cosine.
Step 2: To find the second angle by using the Law of Cosine.
Step 3: To find the third by using the angle sum rule of a triangle.
Here we use the Law of sine. The Law of sine is
In \triangle ABC the sides of triangle is a, b and c and angle \alpha, \beta and \gamma the law of sines is
\frac a{\sin\alpha}=\frac b{\sin\beta}=\frac c{\sin\gamma}