Each of the four diagrams in Figure 7.30 shows lines in the same plane. Classify each of

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Each of the four diagrams in Figure 7.30 shows lines in the same plane. Classify each of the statements in Problems 46–51 as true or false.

a. 50 93 120 a2 a b. b3 60 b -b

C c. C dz d # d d.


The lines b1 and b2 are vertical.

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