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

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

What is the strongest shape?

• Triangle
• Square
• Circle
• None of the above

Which bridge has triangles?

• Suspension
• Arch
• Truss
• none of the above

Which bridge goes over a really long distance of water?

• Suspension
• Arch
• Beam
• none of the above

The wide base of the structure illustrates the...

• stable structure

• toppling structure

• rigidity of the structure

• flexible structure

Identify the manmade structure

• tortoise shell

• spiderweb

• roof truss

• stone