34 degrees
The three angles all add up to a straight line, which is 180 degrees. One angle is 56 and one is marked as a right angle, so 90.
56+90+x=180
x=34
Answer:

Step-by-step explanation:
we know that
Using proportion

Round to the nearest whole number

Answer:
108.04
Step-by-step explanation:
You find the area by multiplying your length times width, so in this case you would be looking at the length and width of the rectangle which you already have which is 14.6 times 7.4. You multiply those 2 together to total out to an answer of 108.04
All of them are wrong except number 12. The top left is 7, the top right is 26, the bottom left is 4. And a little hint, do what's in the parentheses first. Hope I helped!!
The third side is 17. Hope I was able to help