Which congruence theorem can be used to prove △BDA ≅ △BDC? Triangles B D A and B D C share side B D. Sides B C and B A are congruent. Sides A D and D C are congruent.

HL
SSA
AAS
SSS

Which of the following is an important principle of how water moves through a watershed? a. most freshwater is in the form of ice. b. small streams flow into larger streams. c. each watershed contains only a single source of water. d. clouds are formed through evaporation and then condensation.