heartprague
20.01.2020 •
Mathematics
If < a and < b are vertical angles, and < a = 12x + 6 degrees, and < b = 20x -10 degrees, find x.
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Ответ:
2
Step-by-step explanation:
12x+6=20-10 (subtract 6 to -10)
12x=20x+-16 (subtract 20)
-8=-16 (divide -16 by -8)
x=2
Ответ:
4
Step-by-step explanation:
Rectangle has 2
Square has 4
Regular pentagon has 5
Regular hexagon has 6