Question
In the figure, CDHK, FEHJ and BDEG are three straight lines.  ∠i = 72° and ∠n = 57°. Find the value of ∠h + ∠j + ∠k + ∠m.
2 m

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In the figure, CDHK, FEHJ and BDEG are three straight lines.  ∠i = 72° and ∠n = 57°. Find the value of ∠h + ∠j + ∠k + ∠m.