20.2 Incircle of the shoemaker’s knife 539
Second construction
Z
Y X
ABC
Q
P
20.2.3 Woo’s three constructions
Z
Y X
ABC
Q
S
P
Z
Y X
AB
C
M
Z
Y X
ABC
20.2 Incircle of the shoemaker’s knife 539
Second construction
Z
Y X
ABC
Q
P
20.2.3 Woo’s three constructions
Z
Y X
ABC
Q
S
P
Z
Y X
AB
C
M
Z
Y X
ABC