How do i work out the perimeter of a shape
Asked by admin @ in Mathematics viewed by 259 People
Calculate the perimeter of this shape:
19cm and 10cm given.
Answered by admin @
The perimeter of this shape is actually the same of a rectangle with sides 19 and 10.
See the attached picture: the perimeter of our shape is
Whereas the perimeter of the outer rectangle would be
So, as you can see, the only difference is that the first equation features , while the other features
. This is not a problem, because
is a rectangle, and thus we have
and
.
So, the two perimeters are actually the same:
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