Given: abcd ∥gram, bk ⊥ ad , ab ⊥ bd ab=6, ak=3 find: m∠a, bk, aabcd

BK ⊥ AD

So, Δ ABK is a right triangle.

Therefore,

      = 36 - 9

      = 27

units

Also,

cos m∠A =

m∠A =

true? is that what you're asking or do you mean something else?

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step-by-step explanation: