Perimeter is measured in Linear Units because it is Measurement of The Outline or Path of a given shape or area; a Perimeter is NOT the Measurement of What is Inside that Outline/Path. It is a One-Dimensional measurement, which MEANS it is a Linear Unit Measurement, such as Feet or Meters.
Alternatively, a Two-Dimensional Measurement, is the Square of a Linear Unit -- like AREA is a Two-Dimensional Measurement and therefore Measured in Linear Units Squared (i.e. meters2/Square Meters or feet2/Square Feet). Area is the Measurement of What is Contained within a given Perimeter.
Because a perimeter is measured in linear units while an area is measured in square units.
No. Just like a length, a perimeter is measured in linear units.
Because the perimeter is a linear measurement, and area is measured by multiplying 2 linear measurements together.
A perimeter is measured in LINEAR units. Neither 'square' units nor 'cube' units.
Because length is one dimension, thus it's measured in linear units.
Then what do you measure it with?
No, perimeter is always measured in units of length (L)
It's a length.
Area is measured in squared units, such as cm^2. One centimetre squared is a box that is 1cmx1cm. Perimeter is measured in normal units, such as centimetres.
The circumference of a circle is its boundary - it is a perimeter and therefore is a linear measure. Whether it is a smooth curve, as in the case of a circle, or a set of line segments meeting at vertices is irrelevant to its being linear.
A rectangle has a perimeter with linear units, and a surface area with square units. It has no cubic units.
Linear units. Metres, kilometres, feet, inches etc