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# In the regular octagon above, what is x?

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Retired Moderator
Joined: 29 Apr 2015
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Concentration: Economics, Finance
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In the regular octagon above, what is x?  [#permalink]

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15 May 2015, 02:03
1
6
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55% (hard)

Question Stats:

66% (02:26) correct 34% (02:31) wrong based on 107 sessions

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T10363.png [ 3.99 KiB | Viewed 2029 times ]
In the regular octagon above, what is x?

A. 157.5°
B. 150°
C. 145°
D. 135°
E. 120°

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Posts: 222
Re: In the regular octagon above, what is x?  [#permalink]

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15 May 2015, 05:43

Each angle in a regular octagon is 135.

The critical aspect is the bottom 4 sides and then you cut out the rest of the 4 sides.

If you carefully see, there will be two triangles and one of which=135 and divide the remaining side /2 (180-135=45; Divide 45/2=27.5)

X=135

reto wrote:
Attachment:
T10363.png
In the regular octagon above, what is x?

A. 157.5°
B. 150°
C. 145°
D. 135°
E. 120°

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Kudos to you, for helping me with some KUDOS.
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Joined: 07 Dec 2014
Posts: 1206
In the regular octagon above, what is x?  [#permalink]

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27 Dec 2016, 16:42
1
360°/8=45°
Attachment:

octagon.png [ 36.94 KiB | Viewed 1424 times ]
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Re: In the regular octagon above, what is x?  [#permalink]

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05 Aug 2018, 21:55
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Re: In the regular octagon above, what is x?   [#permalink] 05 Aug 2018, 21:55
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