What is the sentence of mensuration?

There isn't a single "sentence" of mensuration. Mensuration is a branch of mathematics that deals with the measurement of geometric figures. It's a broad topic that includes:

* Calculating area: Finding the space occupied by two-dimensional shapes like squares, circles, and triangles.

* Calculating volume: Finding the space occupied by three-dimensional shapes like cubes, spheres, and cylinders.

* Calculating perimeter: Finding the total length of the boundary of a two-dimensional shape.

* Calculating surface area: Finding the total area of all the surfaces of a three-dimensional shape.

So, there are many formulas and methods used in mensuration, each with its own purpose and application.

If you're interested in a specific aspect of mensuration, please let me know and I can help you find relevant information.