Question

find the volume of the triangular prism.

Answer 1

Surface Area?

Answer 2

i guess

Answer 3

OK,
find each face, can you do that?
But I don't have enough information, unless the triangle in the prism is a 45-45-90 triangle, can I assume that?

Answer 4

no they are asking for volume

Answer 5

it says "Area" though.

Answer 6

i got volume , it says volume in the link

Answer 7

I see

Answer 8

in her attachment

Answer 9

Can I assume that your triangle is 45-45-90 ?

Answer 10

you dont have to assume it

Answer 11

there is a right angle, and its isosceles. so it *has* to be 45 45 90

Answer 12

But I only have 2 sides.
Unless "3" is the area of the triangle

Answer 13

you can visibly see the right angle

Answer 14

there is a tick mark

Answer 15

I know

Answer 16

that means the other side must be 3, since the tick mark indicates congruence

Answer 17

then, that's what I was asking if it is 45-45-90 or not.

Answer 18

it must be 45 45 90 .

Answer 19

an isosceles triangle has two congruent (equal) base angles

Answer 20

90 + x + x = 180
2x = 90
x = 45

Answer 21

What I was/am confused about is that the question doesn't tell us that it's an isosceles.

Answer 22

im just saying you dont need to assume it

Answer 23

the tick mark *implies* it is isosceles

Answer 24

definition of isosceles triangle = two sides of triangle are congruent
and it is a right triangle (because of the visible corner square )

Answer 25

it wants volume i fixed it

Answer 26

ok so the volume of a prism is base area times height.
and what is the area of a triangle ?

Answer 27

1/2base*height=Area of triangle

Answer 28

correct. you can remember it this way. a triangle is half a rectangle