Eratosthenes was the first person to accurately estimate the size of Earth. He accomplished this feat by . Group of answer choices comparing the length of an Earth day with the distance between the Earth and the Sun observing shadows simultaneously cast at two different cities that were separated by a known distance measuring the severity of the greatest earthquakes sailing around the world and estimating his average rate of travel

Where was an independent arab state created after world war i

Which statement is a proper biconditional statement for the conditional statement: if a line intersects a line segment at its midpoint, then it is a segment bisector. if a line is a segment bisector, then it intersects the line segment at its midpoint. if a line does not intersect a line segment at its midpoint, then it is not a segment bisector. a line intersects a line segment at its midpoint if, and only if, it is a segment bisector. if a line is not a segment bisector, then it does not intersect the line segment at its midpoint.

Jennifer is visiting her grandmother, who lives in the northeast corner of oklahoma. the region is home to many lakes, and jennifer enjoys canoeing on the illinois and grand rivers. to which region of oklahoma is she traveling? the prairie plains, the ozark plateau, the red river plains, the red beds plains