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# There is a regular pentagram on the picture. Find angle A. 2

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SVP
Joined: 03 Feb 2003
Posts: 1608
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Kudos [?]: 76 [0], given: 0

There is a regular pentagram on the picture. Find angle A. 2 [#permalink]  06 Nov 2003, 04:46
There is a regular pentagram on the picture. Find angle A. 2 minutes.
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penta.doc [175.5 KiB]

SVP
Joined: 03 Feb 2003
Posts: 1608
Followers: 6

Kudos [?]: 76 [0], given: 0

36 is correct
A central angle...
SVP
Joined: 16 Oct 2003
Posts: 1815
Followers: 4

Kudos [?]: 50 [0], given: 0

Can someone explain
SVP
Joined: 03 Feb 2003
Posts: 1608
Followers: 6

Kudos [?]: 76 [0], given: 0

a central angle is twice the angle we need
CA is 360/5=72
A=72/2=36
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