Question

Please help on this geometry question??? (Surface area of a pyramid)

Answer 1

can you find the "purple side" in that triangle using the pythagorean theorem?

Answer 2

17?

Answer 3

yes now let's look at that triangle, the one facing out, like

Answer 4

bear in mind that the pyramid, has a SQUARE bottom, or square base, is a 16x16 square
and we know that area of that

and it has 4 TRIANGLES like the one above, sitting on top of the square at the edges

so, you get the area for that triangle, add it 4 times, PLUS the area of the squarish bottom
and that's the surface area of the pyramid :)

Answer 5

800?

Answer 6

yes

Answer 7

Thanks! :) Do you think you could help me on another problem kind of like this one?

Answer 8

lateral area of a cone is => \(\bf \large \pi r \sqrt{r^2+h^2}\)
h = height, or altitude, in this case 22m
r = radius of base, in this case 14m

Answer 9

I keep getting 365 pi, but it's not an option..

Answer 10

hmmm, maybe I got the total surface....
try this one
http://www.mathwarehouse.com/solid-geometry/cone/images/surface-area-of-cone/lateral-surface-area-formula-picture.jpg

that is \(\bf \large \pi r h\)

Answer 11

308, and that's an option. Thanks! :)

Answer 12

yw