 1. \text{ Do nákresne vložíme upravený obrázok.}

 2.\text{ Posuvník } a;  \text{ bod } S; \text{ kružnicu }k(S,a); \;   D∈k

3.  \text{ Zostrojíme body }E,F:  ED⟂DS \; (\left|DE\right| =a)

4.  \text{Obrázok ukotvíme pomocou bodov }D, E, F

V - vrchol

5.  \text{ Zostrojíme }V - \text{(vrchol meranéh uhla)

\text{  Uhlomer posúvame pomocou bodu } S \;  \; 

\text{  Uhlomer otáčame pomocou bodu } D \;  \; 

 \text{ Narysujte uhol a zistite jeho veľkosť.

A = (2.359110784212533, 0.41429542456675805)
B = (9.349110784212534, 0.41429542456675805)
a = 6 (slider from 3 to 8, step 0.1)
S = (0.8757682990321363, -5.44794030585843)
k = Circle(S, a)
D = Point(k)
f = Line(D, S)
g = OrthogonalLine(D, f)
d = Circle(D, a)
E = Intersect(d, g, 2)
F = Intersect(k, f, 2)
h = OrthogonalLine(S, f)
c = Circle(S, a / 18)
C = Intersect(c, h, 2)
i = OrthogonalLine(C, h)
G = (8.575620406412705, -1.310069644274417)
H = (3.392617464325508, -1.2460819536313652)
I = (9.215497312843224, -4.360149564926551)
j = Ray(H, G)
l = Ray(H, I)
α = Angle(I, H, G)