Most recent change of ConstructingAPentagon

Edit made on October 23, 2009 by ColinWright at 14:38:31

Deleted text in red / Inserted text in green
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[[[>70 IMG:pentagon3.png ]]] COLUMN_START

METHOD !! Method 1

* Draw circle centre A

* Draw perpendicular diameters BC and DE

* Construct midpoint of AD -
** label F

* Construct line BF

* Construct bisector of angle AFB

* Label G - the intersection of bisector and AB

* Draw parallel to CD through G

* Label H intersection of parallel with circle
[[[>70 IMG:pentagon4.png ]]]
* BH is one side of pentagon -
** complete pentagon
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METHOD [[[ IMG:pentagon3.png ]]]
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!! Method 2

* Draw circle centre O, radius OA

* Construct 2 radii perpendicular to OA -
** label OB and OC

* Construct D, the midpoint of OB

* Draw circle, centre D, radius DA -
** label E, the intersection with OC

* Draw circle, centre A, radius AE -
** label F and G, the intersection with the original circle

* AF and AG are two sides of the pentagon -
** complete pentagon
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[[[ IMG:pentagon4.png ]]]
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