Now that you can simplify polynomials, you will apply your knowledge to solving perimeter problems.
Can you work this problem? Kevin is going to frame a rectangular picture with dimensions shown. How much wood does he need to make a frame?
What do you do to find a perimeter of a rectangle? Use your Mathematics Chart to find the formula.
The formula is P = 2l + 2w or P = 2(l + w).
If we use the second formula, what is 2(4x + 8 + 2x + 3)? Interactive popup. Assistance may be required.
12x +22
Let's try another one. Drew is making a banner in the shape of a triangle. He wants to line the banner with a decorative border. How long will the border be?
How do you find the perimeter of a triangle? That's right! Add all of the sides.
So what is (12b – 8) + (12b – 8) + (9b + 8)? Interactive popup. Assistance may be required.
33b - 8
Here's one last perimeter problem. Sharon made a rag rug for her bedroom. If the square rug is 2x + 5 units on each side, what is the perimeter?
How do you find the perimeter of a square? Yes, P = 4s is the formula.
So what is 4(2x + 5)? Interactive popup. Assistance may be required.
8x + 20