Asap! if ∠a ≅ ∠d and ∠c ≅ ∠f, which additional statement does not allow you to conclude that δabc ≅ δdef ?
a) bc ≅ ef
b) ∠b ≅ ∠e
d) ac ≅ df

Identify all the cases where non-probability sampling is used when attempting to study the characteristics of a large city. studies on every subject in the population divide a population in groups and obtain a sample studies with a limited amount of time demonstrate existing traits in a population studies with the nth person selected