The length of this line can be found by using the distance formula. Next find the distance between points 3 and 2 using the formula above. The distance formula is derived from the Pythagorean theorem.
We can either convert the polar points to rectangular points then use a simpler distance formula or we can skip the conversion to rectangular coordinates but use a more complicated distance formula.
Now imagine two points lets say they are 00 and 34 to keep it simple. This method uses spherical triangles and measures the sides and angles of each to calculate the distance between points. The expression above defines how to use the formula for the given two points. Next find the distance between points 3 and 2 using the formula above.