1. Trace le segment [AC] de longueur 4 cm.
2. Trace la droite (d) perpendiculaire à [AC] passant par C,
     puis code l'angle droit.
3. Trace le cercle (C) de centre C et de rayon 6 cm.
4. Marque le point B à l'intersection de (d) et (C), 
    puis trace les segments [BA] et [BC].

(d)

(C)

tracé1: PolyLine[(-1.0680E1,9.9000E-1), (-1.0620E1,1.0100E0), (-1.0495E1,1.1650E0), (-1.0340E1,1.3700E0), (-1.0200E1,1.5500E0), (-1.0100E1,1.7300E0), (-9.8800E0,2.0500E0), (-9.7700E0,2.2000E0), (-9.6700E0,2.3700E0), (-9.5700E0,2.5500E0), (-9.5200E0,2.6700E0), (-9.4500E0,2.8000E0), (-9.3650E0,2.9850E0), (-9.3200E0,3.1500E0), (-9.2600E0,3.2800E0), (-9.2100E0,3.4000E0), (-9.1400E0,3.5200E0), (-9.0000E0,3.5500E0), (-8.8700E0,3.5200E0), (-8.7500E0,3.4400E0), (-8.6400E0,3.3700E0), (-8.4650E0,3.2450E0), (-8.2250E0,3.1150E0), (-8.0700E0,3.0300E0), (-7.9500E0,2.9600E0), (-7.8300E0,2.8800E0), (-7.7100E0,2.8000E0), (-7.5450E0,2.7000E0), (-7.4400E0,2.5900E0), (-7.2600E0,2.4100E0), (-7.1200E0,2.2600E0), (-6.9900E0,2.1050E0), (-6.8500E0,1.9800E0), (-6.7400E0,1.9100E0), (-6.5900E0,1.8200E0), (-6.4250E0,1.7100E0), (-6.2700E0,1.6300E0), (-6.1600E0,1.5700E0), (-6.0000E0,1.4800E0), (-5.8300E0,1.3600E0), (-5.7200E0,1.2900E0), (-5.5200E0,1.2300E0), (-5.3500E0,1.1700E0), (-5.2750E0,1.0500E0), (-5.4300E0,1.0400E0), (-5.5800E0,1.0700E0), (-6.0200E0,1.0700E0), (-6.1800E0,1.0700E0), (-6.3200E0,1.1100E0), (-6.5000E0,1.1400E0), (-6.8400E0,1.1500E0), (-7.0000E0,1.1500E0), (-7.1200E0,1.1300E0), (-7.2700E0,1.1200E0), (-7.4550E0,1.0850E0), (-7.8200E0,1.0700E0), (-8.0550E0,1.0450E0), (-8.8000E0,1.0300E0), (-9.0500E0,1.0050E0), (-9.2400E0,9.9000E-1), (-9.3900E0,9.8000E-1), (-1.0080E1,9.7000E-1), (-1.0240E1,9.7000E-1), (-1.0500E1,9.5000E-1), (-1.0640E1,9.5000E-1), (NaN,NaN), (-9.3200E0,3.1300E0), (-9.2300E0,3.0900E0), (-9.0700E0,2.9700E0), (-8.9350E0,2.7650E0), (-8.7450E0,2.7450E0), (-8.6100E0,2.8900E0), (-8.4750E0,3.0500E0), (-8.4000E0,3.1500E0), (NaN,NaN), (-1.0920E1,5.3000E-1), (-1.0900E1,4.3000E-1), (-1.0860E1,3.0000E-1), (-1.0860E1,1.7000E-1), (-1.0880E1,3.7000E-1), (-1.0850E1,5.8000E-1), (-1.0720E1,7.1000E-1), (-1.0590E1,6.8000E-1), (-1.0540E1,5.6000E-1), (-1.0480E1,3.8000E-1), (-1.0450E1,2.2000E-1), (-1.0430E1,8.0000E-2), (-1.0420E1,-3.0000E-2), (-1.0460E1,1.0000E-1), (-1.0510E1,2.6000E-1), (-1.0560E1,4.0000E-1), (-1.0680E1,3.9000E-1), (-1.0760E1,3.9000E-1), (NaN,NaN), (-5.1400E0,6.7000E-1), (-5.1500E0,5.6500E-1), (-5.1900E0,6.8000E-1), (-5.1050E0,8.4500E-1), (-4.9400E0,8.7000E-1), (-4.9950E0,7.2250E-1), (-4.8800E0,6.7000E-1), (-4.7400E0,5.5500E-1), (-4.7950E0,3.9000E-1), (-4.9800E0,3.7000E-1), (-5.1000E0,3.7000E-1), (NaN,NaN), (-9.0000E0,4.2300E0), (-9.1000E0,4.2500E0), (-9.2500E0,4.2400E0), (-9.3600E0,4.1400E0), (-9.4000E0,4.0300E0), (-9.3550E0,3.8950E0), (-9.2100E0,3.8000E0), (-9.0600E0,3.7900E0), (-8.9400E0,3.7900E0), (-8.8800E0,3.8300E0), (NaN,NaN), true]
tracé2: PolyLine[(-1.0460E1,2.8900E0), (-1.0490E1,2.8000E0), (-1.0550E1,2.6800E0), (-1.0550E1,2.5800E0), (-1.0400E1,2.5700E0), (-1.0250E1,2.5800E0), (-1.0140E1,2.5900E0), (NaN,NaN), (-1.0340E1,2.7300E0), (-1.0340E1,2.6300E0), (-1.0340E1,2.5500E0), (-1.0340E1,2.4700E0), (-1.0320E1,2.4100E0), (-1.0320E1,2.3300E0), (-1.0320E1,2.2500E0), (NaN,NaN), true]
tracé3: PolyLine[(-6.9400E0,3.1900E0), (-7.0300E0,3.1000E0), (-7.0900E0,2.9800E0), (-7.1000E0,2.7700E0), (-7.0600E0,2.6000E0), (-6.8700E0,2.5250E0), (-6.7800E0,2.6300E0), (-6.8250E0,2.7750E0), (-6.9800E0,2.8100E0), (-7.0800E0,2.7900E0), (NaN,NaN), true]
A = (-1.1820332193026966, -4.560394938738471)
C = Point(Circle[A, 4])
f = Segment(A, C)
g = OrthogonalLine(C, f)
c = Circle(C, 6)
B = Intersect(c, g, 1)
h = Segment(B, A)
i = Segment(B, C)
α = Angle(A, C, B)