The answer is Z=67 and Y=110 Explanation: 113 plus z needs to equal 180 so in order to find z, you have to subtract 180-113 which equals to 67. After that, you will have 3 angles, 67, 86, and 97. The sum of the interior angles of a quadrilateral with always equal 360. So to find y you must add all three angles 67+86+97 which will equal to 250. When you get that, subtract 360-250 and you will get angle y which equals to 110.
