Right Trapezoid Problem

Geometry Level pending

Given a right trapezoid ABCD which has 2 right angles at A and D and satisfies 2 A B ‾ = 2 A D ‾ = C D ‾ 2\overline{AB} = 2\overline{AD} = \overline{CD} . Draw a point K on AB. Draw a point H on BC such that DK is perpendicular to HK.

What can we say about triangle DKH? ( Bonus: Prove it)

It's an obtuse triangle It's an isoceles right triangle It's an acute triangle None of the other answers are right It's an equilateral triangle

Tin Le by Tin Le , 15, Vietnam

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