We can see Pythagoras' Theorem in a tiling.

Archimedes show us in 'The Method' how to use the lever law to discover the area of a parabolic segment.

Kepler used an intuitive infinitesimal approach to calculate the area of a circle.

Kepler studied the volume and surface of the sphere. He thought the volume of the sphere as made up of small cones, then he sum all of these cones and get a relation between the surface of a sphere en its volume.

Kepler was one mathematician who contributed to the origin of integral calculus. He used infinitesimal techniques for calculating areas and volumes.

Studying the volume of a barrel, Kepler solved a problem about maxima in 1615.

Using Cavalieri's Principle we can calculate the volume of a sphere.

Mercator published his famous series for the Logarithm Function in 1668. Euler discovered a practical series to calculate.