Why do many structures use triangles, according to the video?

• For aesthetic purposes (looks good)

• To reduce cost

• To support, stabilise, and stiffen the structures

• To make construction easier

Why are triangles used in structural engineering?

• They are easy to calculate

• They can support more weight without changing shape

• They require fewer materials

• They look better (aesthetically pleasing)

What shape did the initial structure fail with when a brick was placed on it?

• Triangle

• Rectangle

• Circle

• Parallelogram

In geometry, what name is given to a shape made of four triangles all stuck together?

• Hexagon

• Octagon

• Tetrahedron

• Pentagon

Why did the initial structure flatten when the brick was placed on it?

• The materials were too weak

• The parallelogram shape allowed it to flatten

• The brick was too heavy

• The base was too small

What are the three 'S's that triangles provide, according to the video?

• Shape, Strength, Symmetry

• Stability, Stiffness, Support

• Size, Speed, Simplicity

• Smoothness, Solidity, Sharpnes

What happened when the presenter stood on an aluminum can?

• It supported his weight indefinitely

• It crushed when tapped on the side

• It immediately flattened

• It bent slowly

What is a common application of triangles in engineering structures? (There are 2 correct answers here)!

• Roofing trusses

• Bridges

• Window panes

• Wall paint designs

What shape was the stool initially that made it unstable?

• Triangle

• Circle

• Rectangle

• Parallelogram

How did adding triangles affect the stool structure?

• It made it more flexible

• It increased stability and stiffness

• It reduced its height

• It made it heavier