A biography of ancient Greek mathematician Archimedes, who invented the compound pulley and other machines. His contributions to mathematics included devising the formulas for the surface and volume of a sphere.
"A biography of ancient Greek mathematician Euclid, known as the father of geometry and author of the mathematics textbook Elements"--Provided by publisher.
"A biography of ancient Greek mathematician Eratosthenes, who used geometry to calculate the circumference of the earth. He is also known as the Father of Geography"--Provided by publisher.