Which angle is a vertical angle with angleefd?

a. angledfb
b. angleced
c. anglebfc
d. angleafb

Ascientist is explaining how background cosmic radiation gives evidence of the big bang theory. she says that radiation has been detected everywhere equally as heat in the universe and is increasing. this has been shown to be residual radiation from the big bang. what error did the scientist make?

East asia is considered a less developed nation. true or false

The oldest seafloor in the atlantic ocean is located closest to the edge of the continents. explain how this age can be used to figure out when north america first began to separate from europe