Get our expert's

answer on brainly

SEE EXPERT ANSWER

Get your **free** account and access **expert** answers to this and **thousands** of other questions.

I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!

Get this expert

answer on brainly

SEE EXPERT ANSWER

Get your **free** account and access **expert** answers to this and **thousands** of other questions

picture?

that picture doesn't look right,
height is already there in the picture

height = distance between triangular bases

but which number is it? there are 2 numbers next to the height

nm. its 13 right?

|dw:1436232499596:dw|

distance between the triangular bases is 20cm right

is that the height of the box?

i thought that was the length

Yes thats the height of the box

|dw:1436232791136:dw|

I think they want they want the length of this segment here
|dw:1436232861596:dw|

thats the height of base, not box

|dw:1436233051396:dw|

is it 12?

yeah because we have a 5-12-13 right triangle
|dw:1436233124402:dw|

that is of course, assuming that's what they meant by "height"

so it Is 12?

yeah

thx. but i dont understand part b

you have 3 lateral sides
Right face
|dw:1436233275185:dw|

left face (hidden)
|dw:1436233294238:dw|

and the bottom face (also hidden)
|dw:1436233324795:dw|

they are the lateral faces

find the area of each lateral face, then add up the areas

how would i find the area of the lateral faces?

each is a rectangle

for instance, the bottom face is a 10 by 20 rectangle

thats 200

|dw:1436233428096:dw|

do the same for the other rectangles

also, don't forget about the triangles as well

how did we get 12 again?

for part a

did you randomly guess 12?

you were the first one to write it

no. i did some random equations and it sounded right to me

|dw:1436233600130:dw|

That's the pythagorean theorem

ok. thx.

for part b it says approximate though. do we have to round?

if we dont round, i got 850 for part b

so yeah I guess in a way, you are rounding

is 850 correct?

close but no

what is it?

how did you get 850? can you show your work?

yes. hold on a sec

|dw:1436234036932:dw|

the triangle portion is where you made an error

each triangle has a base of 10 and height of 12

oh right!!! i forgot about that part. hold on so i can fix it.

840 is the correct answer

yep, 840 square cm

thx!!!

sure thing

is it squared or cubed?

surface area deals with square units (not cubic units)

ok thx