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What is the angle of rotation for rotational symmetry of a regular pentagon? A) 36° B) 60° C) 72° D) 90°
asked
Jun 23, 2020
Mathematics
middle-school
1
answer
5
votes
207k
views
Adding a lubricant can increase a machine's efficiency by reducing___ please help
asked
Mar 18, 2020
Chemistry
middle-school
2
answers
0
votes
51.3k
views
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