Answer:
4
Step-by-step explanation:
11 - 7 = 4
Answer: Fraction of paint used for bird house = 
Step-by-step explanation:
Let quantity of the total paint be 1.
Given: Fraction of paint to book shelf = 
Fraction of Paint to leg = 
Fraction of Paint left = 
Let x= fraction of paint used for bird house.
Total paint = 

So, Fraction of paint used for bird house = 
The answer to your question is true
I guess you are asking the value of the Angle x, if so
it's equal to 180°-31° ==> mes angle x =149°
They are because if two angles that have a side of one triangle that is congruent to the corresponding parts of another triangle, the triangles are congruent to the corresponding altitudes in triangles.