Question

The volume of a pyramid can be evaluated by using the equation V Ah
3
1 = where h is
the height of the pyramid and A is the area of the base of the pyramid. The problem is
to design such a triangular pyramid where the volume is V = 72 cm3 and the height is
h = 12 cm. The base of the pyramid is a rectangular isosceles triangle.
a) Determine the area of the base of the pyramid. Pay attention to the unit of your
answer.
b) Draw a picture of the base triangle of the pyramid in a proper scale.

Answer 1

just one question, how can you have a rectangular isosceles triangle? It's either a recatangular base or a triangular one lol

Answer 2

that is where i am confused LOL but thats the question

Answer 3

Okay, if it's a rectangular base then the Area of the base = LW , so :\[V =Ah/3 \]\[A = (72)(3)/12 = 18cm^2\]

Or, if the base was triangular:

\[A = bh/2\]


then:

\[V = Ah/6\]



\[A = (6)(72)/12 = 36 cm^2\]

that's for part (a)

Answer 4

do you have options? for the answers?

Answer 5

no

Answer 6

>_< then write down both lol, I'm sorry. I've never heard of a rectangular isosceles triangle ._.

Answer 7

but for part a i got 18

Answer 8

same same , so I guess it's a rectangular base after all ^_^

Answer 9

ok, well i guess the person who prepared the exam was either drunk or really tired

Answer 10

maybe, rectangular is a trick in the question and the base is triangular after all.

I agree. ^^"

Answer 11

why don't you ask google? lol

Answer 12

I'm telling you, there's no such thing as a rectangular triangle =_=

Answer 13

she doesnt know

Answer 14

it's either a square, rectangle or triangle. Google = she? ._. LOL!

Answer 15

<-_-> yes, ofcourse google is she <-_->
What did you think.

Answer 16

^^" Google = he?

why did you announce google as FEMALE! >_>

Answer 17

males created it!

Answer 18

so? just because males created it does not mean anything, google is she, i kid you not

Answer 19

nope, it's a HE