construct 13.125 angle!!(simple multiply it by 2 with 5 times)i mean bisector of ..........

Answer :
 
We follow these steps , To construct angle of 13.125$°$
Step 1 : Draw a line AB .

Step 2 :  Take any radius ( Less than half of AB )  and center "  A " draw a semicircle that intersect our line AB at "  P " . Now with same radius and center " P " draw an arc that intersect our semicircle at " Q " . Again with same radius and center " Q " draw an arc that intersect our semicircle at " R " . Now take center " Q " and "  R "  draw arcs and these arcs intersect each other at "  S " . Join AS , line AS intersect semicircle at " T ".

Step 3 : Now take center " T " and "  R "  draw arcs and these arcs intersect each other at "  U " . Join AU , line AU intersect semicircle at " V ".

Step 4 : Now take center " P " and "  V "  draw arcs and these arcs intersect each other at "  W " . Join AW , line AW intersect semicircle at " X ".

Step 5 : Now take center " P " and "  X "  draw arcs and these arcs intersect each other at "  Y " . Join AY , line AY intersect semicircle at " Z ".

Step 6 : Now take center " P " and "  Z "  draw arcs and these arcs intersect each other at "  M " . Join AM and extend it to  " C "


Here
$\angle$BAC  = 13.125$°$