ANGLES
Author: Daniel Mentrard

 Angle droit : 90°

Angle aigu :
compris entre 0° 
et  90°

Angle obtus :
compris entre 90°
et 180°

Angle rentrant :
compris entre 180°
et 360°

Angle plat : 180°

Angle total d'un
 cercle : 360°

Angle aigu

Angle droit

Angle obtus

Angle plat

Angle rentrant

Utilser le curseur pour modifier la valeur de l'angle.

On peut superposer cet angle (par le point bleu) sur
les  angles de droite pour vérifier cette dénomination.

Acute angle:
between 0 °
and 90 °

Obtuse angle:
between 90 °
and 180 °

Reflex angle :
between 180°
and 360°

Right angle : 90°

Flat angle : 180°

Total angle of the
circle  : 360°

Use the slider to change the value of the angle.

Reflex angle

This angle can be superimposed (the blue dot) on
 angles of the right part  to check the name.

Obtuse angle

Right angle

Acute angle

360°

English

French

α = 1.6057029118347832 rad (slider from 0 to 6.283185307179586, step 0.017453292519943295)
A = (5.362193750000001, -3.420209375)
B = (-0.7615406249999999, -3.420209375)
A' = Rotate(A, α, B)
β = Angle(A, B, A')
a = Segment(A, B)
b = Segment(B, A')
C = (20.805953125000002, -4.465725)
D = (18.609312499999998, -4.479346874999999)
C' = Rotate(C, 90°, D)
γ = Angle(C, D, C')
c = Segment(C, D)
d = Segment(D, C')
E = (13.487343749999996, 1.6281374999999987)
F = (11.187209374999997, 1.6281374999999987)
E'_1 = Rotate(E, 45°, F)
δ = Angle(E, F, E'_1)
e = Segment(E, F)
f = Segment(F, E'_1)
G = (21.373518750000002, 1.598265625)
H = (19.103256249999994, 1.5982656249999987)
G'_1 = Rotate(G, 145°, H)
ε = Angle(G, H, G'_1)
g = Segment(G, H)
h = Segment(H, G'_1)
I = (15.429015624999995, -3.1513625000000003)
J = (13.039265624999999, -3.181234375)
I'_1 = Rotate(I, 210°, J)
ζ = Angle(I, J, I'_1)
i = Segment(I, J)
j = Segment(J, I'_1)
K = (12.561315625, -9.215353125)
L = (15.429015625, -9.245225)
k = Segment(L, K)
L' = Rotate(L, 180°, K)
η = Angle(L, K, L')
l = Segment(L', K)
M = (19.52146249999999, -8.468556249999999)
N = (21.19428749999999, -8.468556249999999)
p = Circle(M, N)
m = Segment(N, M)
N' = Rotate(N, 359.8°, M)
θ = Angle(N, M, N')
G'_2 = Rotate(G, 90°, H)
G' = Rotate(G, 180°, H)
E' = Rotate(E, 90°, F)
n = Segment(G'_2, H)
q = Segment(H, G')
r = Segment(E', F)
I' = Rotate(I, 180°, J)
s = Segment(J, I')
O = Point(q)
t = CircleArc(F, E, E')
c_1 = CircleArc(H, G'_2, G')
d_1 = CircleArc(J, I', I)
P = Point(t)
u = Vector(P, E')
Q = Point(t)
v = Vector(Q, E)
R = Point(c_1)
w = Vector(R, G'_2)
S = Point(c_1)
z = Vector(S, G')
T = Point(d_1)
u_1 = Vector(T, I)
U = Point(d_1)
v_1 = Vector(U, I')
V = (8.618228124999998, 5.959559374999998)
W = (8.767587499999998, -9.394584374999999)
a_1 = Line(V, W)
o = 0 (slider from 0 to 1, step 1)
e_1 = Circle(B, 1.75)
texte22: "" + β