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<ACB=? BL _|_AC, AL _|_DK , rectangle (I Soros Olympiad 1994-95 R1 11.2)

Source:

July 31, 2021
anglesperpendiculargeometryrectangle

Problem Statement

Given a rectangle ABCDABCD with AB>BCAB> BC. On the side CDCD, take a point LL such that BLBL and ACAC are perpendicular. Let KK be the intersection point of segments BLBL and ACAC. It is known that segments ALAL. and DKDK are perpendicular. Find ∠ACB.\angle ACB.
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