Déplacer le curseur

C = 2 π r = 2 ×3,1416 × (4 cm) = 25,13 cm

r = 4 cm

C = 2 π r = 2 ×3,1416 × (2 cm) = 12,57 cm

r = 2 cm

Longueur = 25,13 cm

Longueur = 12,57 cm

Rapport C/d = 25,13 / 8 = 3,1425

Rapport C/d = 12,57 / 4 = 3,1425

B = (1, -1)
d = Circle(B, 4)
A = (0, -12)
c = Circle(A, 2)
C = Point(d)
a = Segment(B, C)
α = 0 rad (slider from 0 to 6.283185307179586, step 1*°)
B' = Rotate(B, α, B)
C' = Rotate(C, α, B)
a' = Segment(B', C')
b = Circumference(d)
f = CircleArc(B, C, C')
D = Point(Circle[C, abs(f)])
e = Segment(C, D)
E = Point(Circle[C, abs(b)])
g = Segment(C, E)
F = Midpoint(B, C')
G = Midpoint(C, E)
H = Point(c)
h = Segment(A, H)
A' = Rotate(A, α, A)
H' = Rotate(H, α, A)
h' = Segment(A', H')
i = Circumference(c)
I = Point(Circle[H, abs(i)])
j = Segment(H, I)
J = Midpoint(H, I)
K = Midpoint(A, H')
k = CircleArc(A, H, H')
M = Midpoint(C, D)
texte4: "Longueur = " + e + " cm"
A_1 = (19.056202314788763, -10.925122481068765)
c_1 = Circle(A_1, 2)
H_1 = Point(c_1)
h_1 = Segment(A_1, H_1)
A'_1 = Rotate(A_1, α, A_1)
H'_1 = Rotate(H_1, α, A_1)
i_1 = Circumference(c_1)
K_1 = Midpoint(A_1, H'_1)
k_1 = CircleArc(A_1, H_1, H'_1)
L_1 = Point(Circle[H_1, abs(k_1)])
N_1 = Midpoint(H_1, L_1)
p = Circle(B, 4)
q = Circle(A, 2)
m: (b / 2 * a)
L = Point(Circle[H, abs(k)])
l = Segment(H, L)
N = Midpoint(H, L)
B_1 = (16.285942032170745, -8.32800346611438)
d_1 = Circle(B_1, 4)
C_1 = Point(d_1)
a_1 = Segment(B_1, C_1)
B'_1 = Rotate(B_1, α, B_1)
C'_1 = Rotate(C_1, α, B_1)
b_1 = Circumference(d_1)
f_1 = CircleArc(B_1, C_1, C'_1)
D_1 = Point(Circle[C_1, abs(f_1)])
e_1 = Segment(C_1, D_1)
F_1 = Midpoint(B_1, C'_1)
M_1 = Midpoint(C_1, D_1)
texte5: "Longueur = " + k + " cm"
O = (-2.96114156385929, -5.15420088485763)
P = (5.118784260443254, -5.067630251025813)
Q = (-1.98285488683015, -14.040009308357542)
R = (2.0261379001430786, -14.04000930835754)