Mission #103.7B Determine the perimeter of a polygon or a missing

length when given perimeter and remaining side lengths in problems.

1. The side lengths of the Mauna Loa picnic area are shown below.

What is the perimeter of the picnic area in feet?36 feet

23 feet

Mission #10 - WARM UP

2. Emma brought a blanket with her so she could lay it out on the grass. Use the ruler on the Mathematics Chart to measure the sides of the blanket in inches.

What is the perimeter of Emma’s blanket to the nearest centimeter?

Mission #10 - WARM UP

1. The dimensions of two cabanas are shown below.

Which statement about the cabanas is true?

16 feet

12 feet

18 feet

21 feet

A. The perimeter of Cabana A is 9 feet less than the perimeter of Cabana B.B. The perimeter of Cabana A is 11 feet less than the perimeter of Cabana B.C. The perimeter of Cabana A is 33 feet less than the perimeter of Cabana B.D. The perimeter of Cabana A is 22 feet less than the perimeter of Cabana B.

Cabana ACabana B

Mission #10 - EXPLORATION

2. Hawaiian Falls has decided to put a fence around the perimeter of the new playground. How much fencing will they need to go all the way around the outside of the playground?

15 feet

12 feet

10 feet

23 feet

Mission #10 - EXPLORATION

3. The number of steps it takes Graham to walk around the kiddie pool is shown below.

If Graham takes a total of 44 steps, has he walked completely around the kiddie pool?

12 steps

12 steps

8 steps8 steps

Mission #10 - EXPLORATION

A. Yes, because 8 + 12 = 20 and 20 < 44B. No, because 8 x 12 = 96 and 96 > 44C. Yes, because 8 + 12 + 8 + 12 = 40 and 40 < 44D. No, because 12 x 4 = 48 and 48 > 44

If Graham takes a total of 44 steps, has he walked completely around the kiddie pool?

4. The side lengths of the Hawaiian Halfpipe are shown below.

What is the perimeter of the slide in feet?

52 feet

12 feet16 feet

30 feet

39 feet

12 feet16 feet

30 feet

Mission #10 - EXPLORATION

In the space in your journal, share what you learned today. Include these words:

perimeter

polygon

length

Mission #10 – STAAR Journal