Question

How to find the value of each variable

Answer 1

To find z, 110 degrees and angle z are supplementary angles so the equal 180, 180-110=70 so angle z is 70 degrees. to find y, every shape that has four angles equals 360 so you add 70, 100, and 87 and subtract that from 360 and you get 103 so angle y equals 103 degrees