PR =
PS=
m<KML=
KL=
x=
SR=
m<LMN
Altitude
Median
Angle Bisector
Pependicular bisector
Yes
No
<P
<Q
<R
_<x<_
13
15
21
38
52
59
<B
<C
<D
KM
LM
LK
(n-2)180
((n-2)180)/n
360
360/n