I may not fully understand the question but the value of 7 is 7. The value of 6 is 6 and the value of 9 is 9.
Answer:

Step-by-step explanation:
All the angles in a triangle add up to 
Every right angle triangle has a right angle in it which is 
So to find the remaining angle, you do
-
-
= 
The first bag would be 5.34$ and the second would be 5.53$ and the second bag is better cause your only spending 19 more cents for 1.5 more pounds
They are not the same shape or size. hope this helps!