Example 5 Given m angle7=38^ and m angle10=102^ the measure of each missing angle

angle 1 - 78

angle 2- 102

angle 3- 78

angle 4- 102

angle 5- 38

angle 6- 142

angle 8- 142

angle 9- 78

angle 11- 78

angle 12- 102

angle 13- 38

angle 14- 142

angle 15- 38

angle 16- 142

not sure but it may be b, as i said i'm not sure.

m∠a is 90°

m∠b is 40°