Answer:
105
Step-by-step explanation:
180 - 140 = 40
180 - 145 = 35
35+ 40 = 75
180 - 75 = 105
a = 5
interior angle next to 145 is 180-145=35
interior angle next to 140 is 180-140=40
angle a= 180-35-40=105
