Given three straight lines |
|||
a) |
They form a triangle |
b) |
They are concurrent |
c) |
One line bisects the angle between the other two |
d) |
Two of them are parallel |
Given three straight lines |
|||
a) |
They form a triangle |
b) |
They are concurrent |
c) |
One line bisects the angle between the other two |
d) |
Two of them are parallel |
(b,c)
For the two lines and
, the angle bisectors are given by
Taking positive sign, we get