Question 1171116


Andrew was given a rectangular cardboard {{{28cm}}} by {{{16cm}}}. 

the area of a rectangular cardboard is: {{{A[c]=28cm*16cm=448cm^2 }}}

to see how many {{{right }}}{{{angle}}}{{{ triangles}}} could cut out, find area of one triangle

{{{A[t]=(1/2)bh}}}

{{{A[t]=(1/2)3cm*4cm}}}

  {{{A[t]=(1/cross(2))3cm*cross(4)2cm}}}

{{{A[t]=6cm^2}}}

now divide the area of a rectangular cardboard by the area of a triangle

{{{448cm^2/ 6cm^2=74.6666666}}} => you can cut out {{{74}}} {{{right }}}{{{angle}}}{{{ triangles}}}