Annie96
  • Annie96
Find the perimeter of the figure. Round your answer to the nearest tenth.
Geometry
katieb
  • katieb
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Annie96
  • Annie96
1 Attachment
dessyj1
  • dessyj1
Hi.
Annie96
  • Annie96
Hi.

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dessyj1
  • dessyj1
Which figure, the purple one, or the dotted one?
dessyj1
  • dessyj1
Or is it the whole thing?
Annie96
  • Annie96
I got the area I just need the perimeter.
dessyj1
  • dessyj1
I am trying to figure out which perimeter you need. |dw:1438403519252:dw|
dessyj1
  • dessyj1
|dw:1438403577247:dw|
Annie96
  • Annie96
number 2
dessyj1
  • dessyj1
Ah, okay.
dessyj1
  • dessyj1
It seems like you are missing one side in order to find the perimeter then.
dessyj1
  • dessyj1
You need to use the Pythagorean theorem.
triciaal
  • triciaal
The figure is the shaded section. the perimeter is the sum of the lengths all around. yes you need to find the other length first by using Pythagorean theorem.
rhr12
  • rhr12
54 yd
rhr12
  • rhr12
as i think because the formula is a+b+c
rhr12
  • rhr12
Get it?
Annie96
  • Annie96
the area is 58.5yd^2
triciaal
  • triciaal
to the nearest tenth means to one decimal place. calculate to 2 places then round.
dessyj1
  • dessyj1
|dw:1438403916404:dw| a^2=b^2=c^2
Annie96
  • Annie96
is it 452
triciaal
  • triciaal
|dw:1438404030449:dw|
Annie96
  • Annie96
thank you all so much for your help.
triciaal
  • triciaal
do you have the area because you should use Hero's formula?
Annie96
  • Annie96
yes i said it was 58.5yd^2
triciaal
  • triciaal
I know you said that! I am asking why? there are different ways to do a particular problem.
triciaal
  • triciaal
|dw:1438404498181:dw|
Annie96
  • Annie96
okay thank you
triciaal
  • triciaal
you are welcome

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