4. Curves

Figure 1 - Drawing a perpendicular to the midpoint of [AB].

Figure 2 - Drawing a perpendicular to [AB] at P

Figure 3 - Drawing a perpendicular from P to [AB].

Figure 4 - Drawing a perpendicular to [AX] at A (solutions 1 and 2)

Figure 5 - Drawing a parallel to (AB) through P

Figure 6 - Drawing a parallel to AB through P

Figure 7 - Transfer angle to the right (OD)

Figure 8 - Trace the bisector of the obtuse angle ...

Figure 9 - Trace the bisector of the acute angle ...

Figure 10 - Drawing angles of various values

Figure 11 - Tracing angles from tangents

Figure 12 - Low arch

Figure 13 -  Warhead

Figure 14 - Ogive au tierspoint

Figure 15 - Lancet warhead

Figure 16 - Three-center basket handle

Figure 17 - Five-center basket handle

Figure 18 - Three-spoke ovoid

Figure 19 - Creeping arch

Figure 20 - Construction of a triangle with three known sides

Figure 21 - Construction of a right-angled triangle whose three sides are in the ratio 3, 4 and 5

Figure 22 - Construction of a right-angled triangle whose three sides are in the ratio 3, 4 and 5

Figure 23 - Drawing the circumscribed circle of triangle ABC

Figure 24 - Drawing the inscribed circle of triangle ABC

Figure 25 - Drawing the center of gravity

Figure 26 - Dividing a straight line into equal parts

Figure 27 - Any regular polygon

Figure 28 - Regular polygons

Figure 29 - Drawing ellipses using circle pagination

Figure 30 - Drawing an ellipse with string

Figure 31 - Drawing an ellipse with a ruler

Figure 32 - Parabola tracing by points

Figure 33 - Tracing a parabola by tangent

Figure 34 - Circle properties

Figure 35 - Trigonometric lines

Figure 36 - Trigonometric values