Geometry: using only compasses and straightedge
Divide the sides of a square in 5, divide a square in 25.
Draw a square ABCD. Need help? click here.
Mark the mid point of each half, m,n,o,p. How? click here.
Mark the mid point of each half, m,n,o,p. How? click here.
Draw a triangle BnC.
Draw another triangle AoB.
Fill the square up with triangles.
This makes an octagon (eight sided figure) - in gold. In medieval times they thought this had magical mystical properties.
Lines drawn through the outer points of the octagon divide each side in 5 and divide the square into 25 squares.
Lines drawn through the outer points of the octagon divide each side in 5 and divide the square into 25 squares.