dont understand this question so can you please help ?

Answer:
D
Step-by-step explanation:
Triangles add up do 180 degrees, and you need all of the angles to get that amount
One angle is 29 degrees, the right angle is 90, and theres a
You would then add 90 and 29 to get 119 then subtract the 119 on both sides which leaves u with a=61