The African American mathematician that assisted in the survey of Washington DC was Benjamin Banneker. In addition to being a mathematician, Banneker was also an astronomer.
Benjamin Banakker
Benjamin Banneker
D'John James
He is a black American and a lot of people helped him in life he was a free African American astronomer, mathematician, surveyor, almanac author and farmer
The American mathematician and astronomer you are referring to is Thomas Jefferson's contemporary, Benjamin Banneker. Banneker was instrumental in the surveying of Washington, D.C., and he is well-known for his correspondence with Jefferson, where he challenged the moral implications of slavery and advocated for the rights of African Americans. His efforts significantly contributed to discussions about race and equality in early American history.
The African- American man who helped survey the land that would become Washington D.C. was Benjamin Banneker. He was also a scientist and publisher of almanacs.
John Lewis is an African American Civil Rights Activist. He is most famously noted as having helped to organized the March on Washington in 1963.
African american slaves.
abraham lincoln
In 1928 African American voters in Chicago helped elect Oscar Depriest. He was the first African American representative to congress from a northern state.
George Washington was a general helped lead the American troops. He was a very good leader which helped the Americans win the war.
No African-American player helped organize the National League. It was organized by a group of team owners, non of which were African-American.