∡ABC

Acute Angle

Obtuse Angle

Right Angle

Straight Angle

Zero Angle

Reflex Angle

Complete Angle

Types of angles

α = 1.6057029118347832 rad (slider from 0° to 6.283185307179586, step 0.017453292519943295)
D = (16.396929256091543, -1.2892925609154258)
B = (3.119372769476274, -1.2352912441708555)
D' = Rotate(D, α, B)
γ = Angle(D, B, D')
a = Ray(B, D)
b = Ray(B, D')
text1: " ∠ABC = " + α + ""
A = Point(a)
c = Segment(B, A)
C = Point(b)
d = Segment(B, C)