Estimate, measure and compare length. Match the measuring instrument with the measuring unit.

The object must be shorter than $20 \text{ cm}$ but longer than $10 \text{ cm}$. This means its length $L$ is in the range $10 \text{ cm} < L < 20 \text{ cm}$.

Many everyday objects fall within this length. For example, a standard pen or pencil is typically around $15 \text{ cm}$ to $18 \text{ cm}$ long, which is within the specified range. A smartphone is also often in this range.

An object that could be shorter than $20 \text{ cm}$ but longer than $10 \text{ cm}$ is a pen.

The object could be a:

• Pen