When triangle ABC is reflected across line AB, the image is triangle ABD. Why are segment AD and segment AC congruent?

In what climate does shifting cultivation predominate? and, what are its two characteristics?

From the standpoint of geography, a is an internal rendering of an individual's known world

Which revelation resulted from the observation of the spectrum of different galaxies? a. there were more galaxies whose spectrum was blueshifted b. there were no galaxies whose spectrum was redshifted c. there were more galaxies whose spectrum was redshifted d. there were no galaxies whose spectrum was blueshifted