Question 1062093
{{{
drawing( 300, 300, 0, 10, 0, 10,
 locate(2,2, A),
 locate(4,4, C),
 line(2,2,4,4),
 line(1,5,3,3),
 locate(3.2,3,D),
 locate(1,5.5,B)
)
}}}

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Angle ADB is 90 degrees, as is angle CDB.   Line segment BD does not need to end at AC, I just drew it that way.