Calculate the perimeter of this shape:

19cm and 10cm given.


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 DE+EF, while the other features DG+GF. This is not a problem, because EDGF is a rectangle, and thus we have ED=GF and EF=DG.

So, the two perimeters are actually the same:

2(10+19)=2\cdot 29=58

Calculate the perimeter of this shape: 19cm and 10cm given.

The answer is 58. I got this question and got the answer right.

Step-by-step explanation:

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