In the following figure, ∠1 + ∠2 + ∠3 = 230°, then the measure of ∠4 is equal to

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In the following figure, ∠1 + ∠2 + ∠3 = 230°, then the measure of ∠4 is equal to <br><img src=https://i0.wp.com/farm2.staticflickr.com/1958/44507708915_564f4e363e_o.jpg?resize=216%2C183&ssl=1" alt=" Lines and Angles ">"