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Unit 1.- GEOMETRY. Regular Polygons
Sheet 3.- REGULAR POLYGONS III
Regular Polygons with a given radius and with one known side
In the third sheet we are going to draw an heptagon and an octagon knowing the radius of the circinscribed circumference and a knowing the length of one of their sides. These are the explanations of the constructions:
1.- Heptagon given radius
2.- Heptagon knowing the length of one side
3.- Octagon with a given radius
4.- Octagon knowing the length of one side
Sheet 3.- Regular Polygons III
Here you have an example of sheet 3 :

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