Why Triangles Are Important In Building And Construction?

Why Triangles Are Important In Building And Construction?

Triangles are important Because you can use different materials to create tension and/or compression. When you want to build a house they put triangles in the roof to make the whole building stronger, because if you were to apply force on a house with a square roof it would cause the material to collapse whereas when force is applied to a triangle it will
One create compression 
And Two create Tension along the bottom side.

If you Were to have a failure there are 5 Types.
1. Compression
2. Tension
3. Bending
4. Shear
5. Torsion

1. Compression is when two forces are pushing against each other
2. Tension is two forces pulling against each other
3. Bending is where a force in the middle of say a piece of timber is acting against two forces on each end of the timber, as shown above.
4. Shear is where two forces, one at each end are acting