Perimeter is the distance around a shape. Usually, we measure it using rulers or measuring tapes with units like inches or centimeters. But guess what? We can also find the perimeter using non-standard units! This means using things like paperclips, erasers, or even your own shoes to measure the sides of a shape and then adding those measurements together. It's a fun and hands-on way to understand perimeter!
Match the words on the left with their correct definitions on the right. Write the letter of the definition next to the word.
| Word | Definition |
|---|---|
| 1. Perimeter | A. A tool used for measuring length. |
| 2. Non-Standard Unit | B. The distance around a shape. |
| 3. Measure | C. To find the size or amount of something. |
| 4. Ruler | D. Units of measurement that are not fixed, like paperclips or erasers. |
| 5. Estimate | E. To make a careful guess. |
Read the paragraph and fill in the missing words from the word bank below.
Word Bank: perimeter, shoes, non-standard, distance, measure
When we use items like our _______ to find the _______ around a shape, we are using _______ units. This helps us to _______ the _______ around an object.
Imagine you need to find the perimeter of your desk at home, but you don't have a ruler. What non-standard unit would you use, and why? How would you make sure your measurement is as accurate as possible?
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