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Two lines parallel to a third line are parallel to each other. always sometimes or never

()1. how do you find range? 2.the following set of data is to be organized into a histogram. if there are to be five intervals on the graph, what should the length of each interval be? 30, 34, 23, 21, 27, 25, 29, 29, 25, 23, 32, 31

Iwill give ! if m∠a=59 and m∠3=81°, what is m∠b? m∠b= _[blank]_°