Question

perimeter of a sector​

Answer 1

Answer:

The perimeter of the sector includes the length of the radius ×2, as well as the arc length. So the perimeter is the length "around" the entire sector, the length "around" a slice of pizza, which includes it's edges and its curved arc.

The arc length is just the curved portion of the circumference, the sector permimeter is the length of line AC¯¯¯¯¯¯¯¯=r plus the length of line BC¯¯¯¯¯¯¯¯=r, plus the length of the arc AOC.

The circumference of the circle is the total arc length of the circle.

Length is one-dimensional, the length of a line wrapped around the circle. Area is two dimensional; All of what's inside the circle.