Answer:
81
Step-by-step explanation:
All triangles equal 180 degrees. 34 plus 65 equals 99. 180 minus 99 is 81.
81°
Since you know a full angle is 180°,
you would add 34° and 65° which is 99°
Subtract 180° from 99°
Which is 81°
Check:
34+65+81 which is 180!
