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PilotLPTM [1.2K]
3 years ago
7

A regular decagon has 10 sides. How many reflectional symmetries does a regular decagon have?

Mathematics
2 answers:
lina2011 [118]3 years ago
7 0

The rule for regular polygons are very easy. The number of reflectional symmetries is same as the number of sides. Regular polygons have all sides the same length and all angles same. Reflection symmetry means that you can fold the shape along that line and it will match up.

For this question, we want the number of reflectional symmetries of a regular decagon. Decagon is a 10 sided figure. Hence, the number of reflectional symmetries is 10.

There are 5 symmetry lines from one vertex to opposite vertex and 5 more symmetry lines form midpoint of one side to midpoint of opposite side.

ANSWER: 10

qaws [65]3 years ago
4 0

Answer:

10,10,36

Step-by-step explanation:

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Press A takes 10 hours to do a certain job. So Press A does (1/10)th of the job in an hour.

Press A and Press B, together do (1/2.5) or (4/10)th of the job in an hour.

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Step-by-step explanation:

6 0
3 years ago
If x= -1 and y = -21, then xy – 5x =
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Step-by-step explanation:

3 0
3 years ago
Amanda Vehicle has hired Jared Frost as its new president. Terms included the company’s agreeing to pay retirement benefits of $
vampirchik [111]
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The compound interest formula can be used to find the present value required. 4015 days is 11 years (ignoring leap years), so the amount to deposit can be calculated from
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8 0
3 years ago
How can i simplify 16m cubed -10m squared
adoni [48]
16m cubed - 10m squared......
take out the common factors
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so then it becomes
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5 0
3 years ago
Read 2 more answers
What is the best and easiest method to use to find sides A and B?
Alchen [17]

what is the best and easiest method to use to find sides A and B?

B

3 0
3 years ago
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