Prácticas: Trazado de lineas perpendiculares y paralelas, Círculos dentro de Triángulos, Cuadrados dentro de Círculos y Círculos dentro de Cuadrados
Good question 👍 — let’s look at what kind of triangles the two set squares are:
🟩 45° Set Square
- Angles: 45°, 45°, and 90°
- Type of Triangle:
✅ Isosceles Right Triangle
(two sides are equal, and one angle is a right angle)
Explanation:
Since it has two equal angles (45° each), the two sides opposite those angles are also equal — that’s what makes it isosceles.
The 90° angle makes it a right triangle too.
🟦 30°–60° Set Square
- Angles: 30°, 60°, and 90°
- Type of Triangle:
✅ Scalene Right Triangle
(no sides are equal, and one angle is a right angle)
Explanation:
Each angle is different (30°, 60°, 90°), so all sides have different lengths — that’s what makes it scalene.
It’s also a right triangle because of the 90° angle.
🟠 Protractor
A protractor is not a triangle — it’s a measuring instrument shaped like a semicircle or circle.
✅ Summary Table
| Tool | Angles | Triangle Type | Notes |
|---|---|---|---|
| 45° Set Square | 45°, 45°, 90° | Isosceles Right Triangle | Two equal sides |
| 30°–60° Set Square | 30°, 60°, 90° | Scalene Right Triangle | All sides different |
| Protractor | — | Not a triangle | Used to measure/draw any angle |


