Answer:

Step-by-step explanation:

Answer:
i would go with B
Step-by-step explanation:
I'm not too sure I'm so sorry but thats my closest guess
Answer:
=1
Step-by-step explanation:
A given angle measures 90°.. Then, note that the total measurement of the triangle is 180°... Subtract 180° by 90°, and the other angles must add up to 90°!
Good luck!