It is 35.69 degrees.
Explanation:
Triangles have angles that always add up to 180 degrees.
You already have a 90 degree angle (the square in the corner)
If leg a is 7
And leg c is 12
Then leg b is going to be 9.75
Unit Conversion:
Using the formula
c=a2+b2
Solving forb
b=c2﹣a2=122﹣72≈9.74679
This concludes that angle P is 35.6
And angle O is 54.4
And the one we all ready know the right angle which is 90.
To double check
35.6+54.4=90
And 90+90= 180
