Question 1182278
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(1) One and only one problem per post.  These are two completely different unrelated problems.<br>
(2) In the first problem, you need to make it clear whether he changes his direction by 70 degrees (which means the angle formed by his path is 110 degrees), or whether he changes his path so that the angle formed by his path is 70 degrees.<br>
Re-post the problems separately, clarifying the first one....<br>