Which of the following are true statements about david hilbert?
a he invented the point.
b he was a german mathematician.
c he developed hilbert's axioms.
d he wrote a biography on euclid.
e hilbert's improvements to geometry are still used in textbooks today.

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.

Asap! ! ! western china, northern china and southeastern mongolia are all located in what climate zone? tropical wetdesert humid subtropical humid continental

Which of the following areas has the highest population density?