Structures

Certain shapes strengthen structures. 

• True
• False

Truss bridges use the _____________ shape to strengthen the structure.

• Ovals
• Trapezoid
• Triangle 
• rectangle

Arch bridges need support on the the outside 

• True
• False

It is important for most structures to be strong.

• True
• False

Some buildings and bridges use more than one shape to make the structure strong.  Which shapes are used?

• triangles
• arches
• strengthened rectangle with diagonal support
• all of the above

A suspension bridge uses long __________________ .

• ropes or cables
• bungee cords

A drawbridge opens for _____________  ships and boats.

• short
• tall

What is the strongest shape?

• Triangle
• Square
• Circle
• None of the above

What shape is in a square when you strengthen it?

• Circle
• Hexagon
• Triangle
• Diamond

Which bridge has triangles?

• Suspension
• Arch
• Truss
• none of the above