Answer:
a = 55
Step-by-step explanation:
By exterior angle theorem:
a+10 + 44 = 2a
a= 55
Here's the proof:
Consider the same figure shown
say a+10 = x and 44 = y
Thus the remainng angle is 180 - x-y
and the exterior angle is 180- ( 180 - x- y) = x+y
Thus proved