Need help mainly on part d and e please

Mathematics
Tutor: None Selected Time limit: 1 Day

Jun 9th, 2015

Thank you for the opportunity to help you with your question!

for the case of triangles...

1 ft the perimeter of both triangles, and since they are equilateral we divide the length to get each triangles perimeter

1/2=0.5ft

we can divide 0.5 by 3 to get each side's length.=0.167ft

for squares we divide by 2 to get each squares perimeter and then by 4 to get each side

1/2=0.5

0.5/4=0.125ft

let's go to e before my 20 mins run out!

area of a square will be

0.125^2=0.015625ft

area of triangle

1/2x0.16x0.021=1.673x10^-3

the square has the bigger area!


Please let me know if you need any clarification. I'm always happy to answer your questions.
Jun 9th, 2015

I know the square has the bigger area but I don't know if I did part D correctly

Jun 9th, 2015

I know the square has the bigger area but I don't know if I did part D correctly

Jun 9th, 2015
Jun 9th, 2015
Jun 9th, 2015
Jun 9th, 2015
Jun 9th, 2015
Jun 9th, 2015

I know the square has the bigger area but I don't know if I did part D correctly

Jun 9th, 2015
Jun 9th, 2015
Jun 9th, 2015
Jun 9th, 2015

part D requires knowledge of the areas formed by the wire in both square and triangle shapes.....since the shapes are in two's,we divided the length with 2 to get each shapes perimeter. then using the perimeter we calculate the respective lengths which in turn helps us find the area

Jun 9th, 2015

Alright so in other words I don't have to use the formula for the equilateral triangle to figure it out right?

Jun 9th, 2015

no...but i used ratio theorem to find the height but you use sin theta to find the area using sides only(since equilateral triangle has 60 degrees each angle!

Jun 9th, 2015

Oh she didn't teach us that only gave us this formula √3\4*(side)^2 darn I'm going to be stuck on this but thanks for the help you gave me 

Jun 9th, 2015

oh!...sorry for feeding unneccessarry info,welcome!

Jun 9th, 2015

Its okay

Jun 9th, 2015

Okay I did all of the parts except E& F for E how will I find the minimum ?

Jun 10th, 2015

very easy...F.just comparing the areas of the two pairs(the triangles and squares).....of course the squares have bigger area

E.i already explained that !

Jun 10th, 2015

I'm sorry so for part e all I have to say is that the minimum of the total area is 0.016?

Jun 10th, 2015

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