Question 1130643
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calculate 


1.  < {{{A B D}}} = > < {{{A B O}}}    + <{{{O B D}}}

< {{{A B O=360/5=72 }}}
 
 observe triangle   {{{O B D}}}: -> angle {{{BOD=144}}} and  the  < {{{O B D}}}=< {{{ODB}}}

so, < {{{O B D=(180-144)/2=36/2=18}}}

hens  < {{{A B D = 72+18=90 }}}  


2.  < {{{AOD}}} = <{{{AOE}}}+ < {{{EOD=360/5+360/5=2*72=144}}}