Prove that the diagonals of a parallelogram bisect each other.
the midpoints are the same point, so the diagonals
b(2b, 2c)
c(2a + 2b, 2c)
d(20, 0)
given: parallelogram abcd
prove: ac bisects bd, and bd bisects ac.

The boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a) e = 2b - 212 b) b = 2e - 212 c) e = -2b + 212 d) b = -2e + 212