THIRD TANGENCY PRINCIPLE
Erabaki
Konponketa
A BISECTOR can be defined as the line formed by
all the points that are centres of tangent circles of
two secant lines.
The points of tangency are located by drawing
a perpendicular from the sceptre of the circle
to the given straight lines.
REMEMBER HOW TO DRAW A
PERPENDICULAR BISECTOR
THIRD TANGENCY PRINCIPLE
All cirumferences tangent to two secant lines
have their centres in the bisector
A BISECTOR can be defined as the line formed by
all the points that are centres of tangent circles of
two secant lines.
The points of tangency are located by drawing
a perpendicular from the sceptre of the circle
to the given straight lines.
REMEMBER HOW TO DRAW A
PERPENDICULAR BISECTOR
THIRD TANGENCY PRINCIPLE
All cirumferences tangent to two secant lines
have their centres in the bisector
r
s
bis.
C1
C2
Ts2
Ts1
Tr1
Tr2
r
s
V=C1
arc1
C2
arc 2
arc 3
C3
V
I