Welcome to our 2nd Grade Math Competition Test | Level 1, the shapes challenge. Read carefully and be diligent. Good luck!
2nd Grade Math Competition Test
Level 1 Challenge (10 Questions)
*Note: The visual diagrams to Questions to 1, 4, and 9 are below.*
*This is a multi-part question and cannot be auto-graded. Please solve it separately.*


Math Vocabulary to learn
Perimeter – Обиколка – The perimeter of a triangle.
Circumference – Окръжност – The circumference of a circle.

📐 Names of Triangles
| Classification System | Triangle Name (English) | Translation (Български) | Defining Property |
| By Sides | Equilateral triangle | Равностранен триъгълник | All 3 sides are the same length. |
| Isosceles triangle | Равнобедрен триъгълник | At least 2 sides are the same length. | |
| Scalene triangle | Разностранен триъгълник | No sides are the same length. | |
| By Angles | Right triangle | Правоъгълен триъгълник | Has one $\mathbf{90^\circ}$ (right) angle. |
| Acute triangle | Остроъгълен триъгълник | All three angles are acute (less than $90^\circ$). | |
| Obtuse triangle | Тъпоъгълен триъгълник | Has one obtuse (greater than $90^\circ$) angle. |
Core Descriptive Terms
2nd graders are expected to be able to analyze and compare shapes using the following attributes:
- Vertices (or “Corners”)
- Sides
- Faces (for 3D shapes like cubes, cones, cylinders)
- Closed vs. Open
- Equal Sides (They start discussing if all sides or angles are the same).

2nd Grade Geometry Terms
| Shape | Sides/Angles | Key Terminology Students Should Know |
| Triangle | 3 sides, 3 angles (vertices) | Sides, Vertices (or corners), Closed (it’s a finished shape), 3-sided figure. |
| Quadrilateral | 4 sides, 4 angles | Quadrilateral (general term), Sides, Vertices. They should recognize examples like squares, rectangles, and rhombuses as all being quadrilaterals. |
| Pentagon | 5 sides, 5 angles | Sides, Vertices, 5-sided figure. |
| Hexagon | 6 sides, 6 angles | Sides, Vertices, 6-sided figure. |
| Cube | 6 faces, 12 edges, 8 vertices | Faces (flat surfaces), Edges, Vertices. They should know this is a 3D shape. |
| Circle | 0 sides | Curve, Round, No vertices. |
Finished this one? Are you ready for a new 2nd Grade Time Telling Quiz?
