image/svg+xml
CJD is a triangle rectangle in J
SIN(θ)=JD/CD
CD=JD/SIN(θ)
With JD=13,5 mm
(half of 27 mm)
and θ=acos(1/3) = 70,5° this gives
CD=14,31891232 mm
23,4 mm
15,0 mm
27,0 mm
2,6 mm
3,0 mm
KI14,8 mm
CE17,0 mm
15,0 mm
27,0 mm
θ
θ
A
B
D
J
I
C
C
I
D
A
B
AID is a triangle rectangle in I
TAN(θ)=AI/ID
ID=AI/TAN(θ)
With AI=7,5 mm and θ=acos(1/3) this gives
ID=2,651650429 mm
and
CI = CD+DI = 16,97056275 mm
θ
E
F
G
H
K
L
F
K
E
The triangle EFL is same as AID
cos(θ) = ID/AD
AD = ID/cos(θ)
With ID = 2,651650429 mm this gives
EF = AD
EF = 7,954951287 mm
The triangle GKF is rectangle in K
tan(θ) = GK/KF
KF = GK/tan(θ)
With GK = 13,5 mm and θ = acos(1/3)
KF = 4,772970773 mm
EK = EF - EK
EK = 3,181980515 mm
KI = CD-ID+EK
KI = 14,84924241 mm
60°
30°
60°