14,15,16,17,18,19

It looks like you've posted an image of some math exercises involving calculations with polygons and word problems. While I can't provide specific answers directly from images, I can guide you on how to approach these types of problems.

Here's a general approach for tackling math exercises like these:

1. Understanding the Problem:

   • Read the problem carefully.
   • Identify what is being asked and what information is given.

2. Set Up the Equation:

   • Use the given information to set up equations or expressions.
   • For geometric problems, use formulas related to perimeter, area, etc.

3. Solve the Equations:

   • Perform algebraic manipulations to solve for the unknowns.
   • Keep track of units (e.g., cm, m).

4. Check Your Solutions:

   • Plug your solution back into the original problem to ensure it makes sense.
   • Verify the results with multiple methods if possible.

5. Word Problems:

   • Translate words into mathematical expressions.
   • Define variables for unknown quantities.
   • Set up equations based on relationships described in the problem.

If you can share specific details or examples from the text, I can help you set up or solve specific kinds of math problems.