Question

The shown net forms a regular square pyramid with all lateral and base edges the same length.find the following: @terenzreignz

Answer 1

http://www.chegg.com/homework-help/questions-and-answers/9-lateral-area-right-regular-triangular-prism-18-cm-2-total-surface-area-answer-decimal-fo-q2070861

Answer 2

welcome to os

Answer 3

got a slant height of\[\sqrt{3}\]

Answer 4

Hi @peoplesay1123. A Warm Welcome to OS.

Answer 5

im sorry thats way hard for me :(

Answer 6

np

Answer 7

Okay... show me what you've done so far...

Answer 8

well i got the slant height as \[\sqrt{3}in.\] and i got the perimeter of the base as 8 in. and the base area as 4 in^2 and idk if any of those are correct but thats all i could came up with. Then i had the Lat area as about 6.93 in^2 and the surface area as 10.93 in^2. I think some of it is wrong though idk.

Answer 9

I posted the attachment for the diagram of this problem in these comments, just so u know.

Answer 10

Remember, those triangles at the side are equilateral triangles...

Answer 11

yea

Answer 12

Well, I vividly remember telling you the formula for the area of an equilateral triangle yesterday... we even derived it.

Did you pay attention? :P

Answer 13

yeah i remember that but how do i use that formula to find thae slant height and base perimeter and base area and lat area.

Answer 14

Don't worry, your slant height, base perimeter and base area are correct.

Answer 15

isnt the formula for a the lat area of a regular pyramid 1/2(perimeter of base)(slant height)

Answer 16

?

Answer 17

I suppose. Yes, that's right.
Work that out, you get...?

Answer 18

about 6.93 in.^2

Answer 19

Nope... try again... or you could show me how you got that...

Answer 20

1/2(8)(sqr root of 3)=
4(sqr root of 3)=
6.928=
6.93

Answer 21

ahh... the base length is 2, not 8.

Answer 22

but isnt the formula 1/2Pl ?

Answer 23

not 1/2Bl

Answer 24

Oh... sorry, right.
I thought it was just one face.
Then it's right, what you did ^_^

Answer 25

oh ok and the surface area is about 10.93 .

Answer 26

?

Answer 27

Right.
did you actually need help with this? ^_^

Answer 28

oh i guess i wanted to make sure. Because if you look at the diagram it show Lateral Area= and i thought i was not getting the right answer becuase my lateral area didnt EQUAL 6.93 it was ABOUT 6.93. so wouldnt i use

Answer 29

\[\approx \]

Answer 30

and not>>> =

Answer 31

Whatever floats your (or your instructor's) boat, I assume. And lol, that sign looks fancier XD

Answer 32

oh alright i guess it dosent matter then its all the same i guess.. thanks for the reassuring help lol