Answer:
2
Step-by-step explanation:
We know that these angles HAVE to add up to 90°.
First lets eliminate the extra number (16). To do so, we just need to add it to 54.
54 + 16 = 70
Now there is 20 degrees missing.
So we just need to divide 20 by 10
20 ÷ 10 = 2
So 2 is the answer
