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2 years ago

Help please and thank you!!!!!

Mathematics

1 answer:

Zigmanuir [339]2 years ago

8 0

9514 1404 393

Answer:

a) 2 and 4; b) 1&2, 2&3, 3&4
x = 16

Step-by-step explanation:

1a. Vertical angles share a vertex and are composed of opposite rays. Here, angles 2 and 4 are vertical angles.

1b. Consecutively numbered angles are adjacent, as are angles 1 and 5. The pairs of interest can be chosen from ...

1&2, 2&3, 3&4, 4&5, 5&1

2. Angles 1 and 3 have the same measure, because they are vertical angles. Then we have ...

78° = (5x -2)°

80 = 5x . . . . . . . divide by °, add 2

16 = x . . . . . . . divide by 5

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