Can height be negative?

If it goes under standard level.

Exe; sea level is 0 feet.
Anything under the sea is x feet below 0.

No, height cannot be negative. Height is a measure of vertical distance or elevation and is typically represented by a positive value. It is commonly measured from a reference point, such as sea level or the ground. Negative values indicate a position below the reference point, which is usually not applicable in the context of height.

To verify this concept, you can consult various reliable sources such as textbooks on physics or geometry, as well as online resources that explain the definition and properties of height.