What is the perimeter of a pie piece if the pie is sliced into 40 degree pieces and its area is 361π?

An ant walks around the edge of circular pizzas left on the counter of a pizza shop. On most days, it is shaken off the pizza before it manages to walk the complete distance.

Quantity A: The distance covered by the ant when walking over four slices of a pizza with a diameter of and equally-sized pieces.

Quantity B: The distance covered by the ant when walking over a complete personal pizza with a diameter of inches.

What can we say about the two quantities?

What is the length of the arc of a circle with radius 10 that traces a 50 degree angle?