Find the angle measure. Then classify the angle. Show your work.

1. what is the measure of ∠abc? what is the measure of ∠abd?

(60 points) explain this in detail

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