Square Dekameter [dam²]
A square dekameter (dam²) is a unit of area representing a square with sides 1 dekameter (10 meters) long.
1 dam² = 100 m².
It’s used to measure medium-sized areas like small plots of land or large rooms.
Circular Mil
A circular mil is a unit of area used mainly to measure the cross-sectional area of round wires and cables in electrical engineering.
Defined as the area of a circle with a diameter of 1 mil (1 mil = 0.001 inch).
Area = (diameter in mils)² circular mils.
1 circular mil ≈ 7.854 × 10⁻¹⁰ square meters or 0.7854 square mils.
Circular mils simplify calculations for round wires since area scales with the square of the diameter.