Ready to turn your students into math detectives? In this Distance Formula Decode the Mystery Number activity, solving coordinate geometry problems becomes a clue-filled adventure! Students apply or use the distance formula to crack 8 problems, uncover secret codes, and reveal a mystery number that checks out against clever clues — it’s math with a mission!

This Algebra 1 resource reinforces how to use the distance formula and challenges students’ critical thinking as they match clues, solve problems, and decode their final answer using a cipher.

✅ What's Included:

• 3 different versions of the mystery number activity
• Cipher table + clues to solve
• Full answer keys for easy checking

Use this engaging and versatile activity for independent practice, math centers, partner work, review stations, early finishers, or sub plans.

✏️ How It Works:

1. Students read the clue to guess what kind of number they’re hunting for.
2. They solve 8 distance formula problems—no shortcuts allowed!
3. Next, they decode their answers using the cipher table to reveal hidden numbers.
4. Add ‘em up... and if they cracked it right, the final total matches the clue!
   

Note: These worksheets don’t include workspace, but students can show their work on notebook paper (you know they should anyway!).

⭐️ Great For:

• Independent work or math centers
• Partner practice or early finishers
• Review days, sub plans, or just mixing things up!

These printable algebra worksheets are a great way to sneak in practice while keeping things light and engaging.

❤️ Love this resource?

Check out our full “Decode a Mystery Number” collection for more topics your students will love!

• Absolute Value Equations {Decode a Mystery Number}
• Determinant of a 2x2 Matrix {Decode a Mystery Number}
• Distance Formula {Decode a Mystery Number}
• Factoring Trinomials {Decode a Mystery Number}
• Logarithmic Equations {Decode a Mystery Number}
• Midpoint Formula {Decode a Mystery Number}
• Multi-Step Equations {Decode a Mystery Number}
• Proportions {Decode a Mystery Number}
• Quadratic Equations {Decode a Mystery Number}
• Radical Equations {Decode a Mystery Number}
• Rational Equations {Decode a Mystery Number}
• Radical Expressions {Decode a Mystery Number}
• Slope Formula {Decode a Mystery Number}
• Systems of Equations {Decode a Mystery Number}
• Two-Step Equations {Decode a Mystery Number}

We hope that you and your students enjoy this Decode a Mystery Number activity. Our goal is to create quality math resources that will be helpful in your class instruction. If you found any errors/typos or have any questions about this product, please don’t hesitate to contact us at tpt@chilimath.com Thank you!

Mike and Kathy

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