Answer:
?=9
Step-by-step explanation:
We have a special right triangle, the 45-45-90 triangle.
In a 45-45-90 triangle, the side lengths are x, and the hypotenuse is x√2.
Since we know that the side length is 9, this means that:

The ? is 9.
Answer:
-6
Step-by-step explanation:
Answer:
the answer is 12
Step-by-step explanation:
it is what it is
The 3 angles must add up to 360 degrees
Only 1 and 4 fit the bill.