Is "geometry" plural or singular? [closed]

Which one of the following sentences is correct?

The geometry of the objects are known.

The geometry of the objects is known.

Both cases are common in the literature and have been used interchangebly!

Solution 1:

Geometry is singular and should be followed by a singular verb ("is", "has")

geometry - noun, pl. geometries.

The mathematics of the properties, measurement, and relationships of points, lines, angles, surfaces, and solids. The Free Dictionary.

geometries - pl.

• "Three geometries were used to show this effect."
• "These geometries were chosen because they maximize detection capability."

Solution 2:

Most dictionaries (such as http://dictionary.cambridge.org/dictionary/british/geometry) give the word as uncountable. In the original sentence, it is definitely not plural. The sentence is: The geometry [of objects] is known.