Introduction
Triangles are important shapes in mathematics and are found in many things around us. In this WebQuest, students will learn about the SSS (Side-Side-Side) triangle congruency rule and understand how three given side lengths can be used to construct a triangle.
Students will use a ruler and compass to construct different triangles. They will also measure the sides and check whether the sum of any two sides is greater than the third side. Through these activities, students will develop their skills in measuring, constructing, and identifying triangles.
Key Vocabulary
| Vocabulary | Meaning |
|---|---|
| SSS condition | Three corresponding sides of two triangles are equal. |
| Side length | The measurement of a side of a triangle. |
| Vertex | A corner or meeting point of a triangle. |
| Intersection | The point where two lines or arcs meet. |
| Congruence | When two shapes have the same size and shape. |
| Compass | A mathematical instrument used to draw circles and arcs. |
| Ruler | An instrument used to measure and draw straight lines. |
Task
You are a young geometry learner. Your task is to complete three activities:
- What does SSS (Side-Side-Side) triangle congruency mean?
- How can you construct a triangle using three given side lengths, a ruler, and a compass?
- How can you check that the measurements of your constructed triangle are accurate?
- How can you verify that the sum of any two sides is greater than the third side?
- Can you create your own triangle using three side lengths and explain whether the lengths can form a triangle?
Process
Process
- What does SSS stand for in triangle congruency?
- How can you construct a triangle when three side lengths are given?
- How can you use a ruler and compass to construct a precise triangle?
- How can you check that the sides of your constructed triangle are correct?
- Why must the sum of any two sides be greater than the third side?
Evaluation
4. Evaluation
Your teacher will check your work using the following:
| Criteria | Yes | Not Yet |
|---|---|---|
| States what SSS means | ☐ | ☐ |
| Uses the ruler correctly | ☐ | ☐ |
| Uses the compass correctly | ☐ | ☐ |
| Constructs the triangles correctly | ☐ | ☐ |
| Measures the side lengths | ☐ | ☐ |
| Checks the sides correctly | ☐ | ☐ |
Quick Questions
- What does SSS mean?
- What tool is used to measure sides?
- What tool is used to draw arcs?
- What is a vertex?
- What must be true about the sum of any two sides?
Conclusion
Conclusion
You have completed the SSS Triangle WebQuest.
You have learned that:
- SSS means Side-Side-Side.
- A ruler and compass can be used to construct a triangle.
- The three given side lengths can be checked by measuring the sides.
- The sum of any two sides must be greater than the third side for a triangle to be formed.
Remember:
SSS helps us construct and identify congruent triangles.
Credits
Member- Ititaake & Etaneti
Teacher Page
This WebQuest helps students develop research, critical-thinking, teamwork, digital, communication, and problem-solving skills. It also allows them to use information they find online to understand and solve a real environmental problem in their school.