How do I use this formula with coordinates to solve central angle of a triangle

The inside wheels of a car traveling on a circular path are rotating half as fast as the outside wheels. the front two wheels are six feet apart. what is the number of feet in the path traced by the inside front wheel in one trip around the circle? express your answer in the form "k \pi", where k is an integer.

Write each fraction as an equivalent fraction with a denominator of 120then write the original fractions in order from samllest to largest

What is the measure of the smallest angle in the diagram? 15 29 32 45