2r

v

r = 3.2 (slider from 0 to 10, step 0.1)
v = 7.2 (slider from 0 to 10, step 0.1)
f_1(x) = sqrt(r² - x²) / 2
f_2(x) = -sqrt(r² - x²) / 2
g_1(x) = v + sqrt(r² - x²) / 2
g_2(x) = v - sqrt(r² - x²) / 2
A: (-r, 0)
B: (r, 0)
C: (r, v)
D: (-r, v)
P, a, v_2, c, d = Polygon(A, B, C, D)
d_1 = Segment(A, C)
E = (0, 0)
F: (0, v_2)
b = Segment(F, E)
s_{11}: r²
s_{12}: π s_{11}
T5: "S=" + s_{11} + "π=" + s_{12}
s_{21}: 2 r v_2
s_{22}: π s_{21}
T2: "S_{pl}=" + s_{21} + "π=" + s_{22}
s_{31}: 2 s_{11} + s_{21}
s_{32}: π s_{31}
T3: "P=" + s_{31} + "π=" + s_{32}
s_{41}: r² v_2
s_{42}: π s_{41}
T4: "V=" + s_{41} + "π=" + s_{42}
T6: "S_{op}=" + s_{21}
s_{51}: v_2² + 4 r²
s_{52}: sqrt(s_{51})
T7: "d_1=" + d_1
α: atan(v_2 / (2 r)) 180 / π
T8: "α=" + α + "°"
s_{61}: v_2² + (2 π r)²
s_{62}: sqrt(s_{61})
T9: "d_2=" + s_{62}
β: asin(v_2 / s_{62}) 180 / π
T10: "β=" + β + "°"
s_{01}: 2 r
s_{02}: s_{01} π
T11: "o=" + s_{01} + "π=" + s_{02}