They are multiplying by two .
The formula for arc length is S = ∅*r.
Where S is the arc length, ∅ is the angle measure in radians, and r is the radius of the circle.
S = *1
S =
Answer:
The 3rd term is

Step-by-step explanation:
From the given information, the first term of the sequence is

The common ratio of the sequence is

The explicit formula for a geometric sequence is :

To find the third term, we put n=3 to get:

This simplifies to:
