721% is the right answer.
Ok lol I was going to put 180 but if you got it than that’s fine.
In a right-triangle, if either of the other two angles are "half that measure", or half of 90°, that means 45°, then the last angle will also have to be a 45° one too, and the sides coming from the 90° angle, will be equal twins, and therefore they can only make up one type-length hypotenuse, and due to that, you can only make that one triangle. Check picture below.
First step: (simplify) y+9+7y+63, Second step: (combine) 8y+72
Answer: I think the value is 44.
Step-by-step explanation: