Perimiter of a rectangle.
Perimeter of a rectangle:
= Length + Width + Length + Width
= 2(Length) + 2(Width)
Circumference of a circle.
Circumference of a circle:
= Pi x Diameter
[Circumference means the area around the circle]
Length of an arc.
Length of an arc:
= (theta / 360') x 2(Pi x Radius)
[the theta is the unknown angle of an object]