Question

How to find the angles of a triangle given 3 points cordinates

Answer 1

The following steps,
Step 1: Begin by using the cosine rule to find the largest angle.
Step 2: Use the sine rule to find one of the remaining angles.
Step 3: Use the 'sum of internal angles' rule to find the third angle... The sum of the internal angles equals 180º ... A + B + C = 180º so. B = 180º - (A+C)