The Riemann sum is a method for approximately calculating the integral of a function.

He placed a round plate on the table.

This circle is perfectly even.

What is the volume of this box?

This math problem requires finding the product.

It became as cold as the snow piling up.

The Schwarzschild radius is an important concept for understanding the characteristics of black holes.

He is using that coat from winter to spring.

You need to use your head to solve this problem.

This circle looks perfect.