Understanding triangles is super important in Year 7 math for a few reasons:

1. Types of Triangles:

   • Scalene: All three sides and angles are different.
   • Isosceles: Two sides are the same length, and it has two equal angles.
   • Equilateral: All three sides and angles are the same; each angle is $60^\circ$.

2. Angle Sum Property:

   • The total of all angles in any triangle is always $180^\circ$.
   • This basic idea helps us understand more about other shapes.

3. Real-Life Uses:

   • Triangles are important in building things, like buildings and bridges.
   • Studies show that about 30% of geometry problems are about triangle properties.

Getting a good grip on these ideas helps with spatial reasoning. This is important for higher math classes and for solving problems in everyday life.