Do you know the current world population? what units did you use in this estimate? what site did you use to locate this information?

answer:

7.7 billion people

for the 2nd question and look up the worlds population

step-by-step explanation:

need more information

step-by-step explanation:

δabc ≅ δdcb by sas because

db ≅ ac . . given (side)

bc ≅ bc . . reflexive property (side)

∠dbc ≅ ∠ acb . . alternate interior angles where transversal bc crosses parallel lines bd and ac (included angle)