What is a sector and an arc tutoring

The video tutorial explains the fundamental concepts of circles, including their definition, parts such as the center, radius, and diameter. It further delves into the concept of sectors, explaining how to calculate their area as a fraction of the circle's total area using the formula π R-squared. Finally, it covers the circumference of a circle and introduces arcs, which are parts of the circumference between two points.

What is a sector in relation to a circle?

What is the term used for a part of the circumference between two points?