find the lengths of the lettered angles and sides. No approximation for square root is allowed

Answer:
Step-by-step explanation:
ΔABC
ΔDBC
∠BDC ≅ ∠DBC ⇒ y = 45°
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ΔMPN is right isosceles triangle ⇒ MN = PN√2 = 14√2
ΔMKP is right isosceles triangle ⇒ MK = KP