See the attachment below, co-interior angles lie at the same side of the transversal, or the line that crosses between the two parallel lines.
So if you are finding the co-interior angle of ∠AGH, then it is ∠CHG.
They are also supplementary angles and will add up to 180°.
ANSWER
36 .19
EXPLANATION
We want to estimate

This is the same as

or

We multiply the numerators to get,

We convert to decimals to get

L= 4*B+42
L= the load
B is the weight of each brick
42 is the weight of the carrier
Answer: 9 L
Step-by-step explanation:
Given
The dimension of the rectangular container is 
It is filled with
of the height
Water present in the container

Also, 

Now, half of the water is poured out
So, half is left

Thus, 9 L of water is left in the container