METHOD TO BUILD A GIVEN OVAL Axis.
Draw the axis AB.
Then the major axis is divided into four equal parts, with the method of the compass. Getting the points C, M and N. Taking the radio
MA is center M, and N to describe two circles tangent to each other. Using
center M and N, MN opening, two arcs are drawn we define the points P and Q. Plot
from P and Q lines that pass through the points M and N and extend to determining circumference cut points T, V, R and S. Using
center P and Q and QT opening and describes the arches PS and RS TV. Being defined in the oval.
METHOD TO BUILD A SMALL OVAL BECAUSE THE SHAFT. Draw the
minor axis AB.
Draw the midpoint of segment AB, the method of the compass, and continues the line. Using center M and AM opening is plotted on the axis distance AM on both sides, getting the points C and D.
ABCD points are joined, forming a square and extend the sides of the square. Using
center A and B, AB opening describes the arc PQ and ST. Using
center C and D, with opening CP describes the PS and QT arches. Being defined in the oval.
method for constructing a football GIVEN the minor axis.
Draw the minor axis AB.
Draw the midpoint of segment AB, the method of the compass and continues the line. Using
center M and AM opening draw a circle that cuts the axis at points C and F. Joining points
AF and BF, extend both lines. Using
center A and B, AB draw two arches opening to cut the lines AF and BF, getting the points G and E
Using F center and draw an arc opening FG GE. The ball being defined.
METHOD TO BUILD A SPIRAL OF TWO CENTERS.
Given the centers A and B, joining them with a line that extends from side to side.
We plot the midpoint of segment AB, the method of the compass.
With center M and MA opening trace the arc AB.
With center opening in A and AB draw the arc BC.
with center at B and draw the arc BC opening CD.Se spiral continues alternating the center A and B, on the radius from the center to the free end of the arc.
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