Question

Geometry help please

Answer 1

a^2 + √3( a^2 )

Answer 2

im really confused on this

Answer 3

Do you know the formula for the area of a triangle?

Answer 4

im looking for surface area of the pyramid

Answer 5

And you don't see any triangles in the pyramid?

Answer 6

im just going by the directions

Answer 7

Forget the directions, listen to me.
A pyramid is made of nothing but triangles.

Your pyramid is made of 6 triangles and a hexagon.

The hexagon itself can be split into 6 triangles.

1 triangular face of the pyramid and 1/6 of the hexagon can be laid out as I showed you in the picture.

That kite shaped figure is 1/6th the area of your pyramid.

Figure out its area, and that area is 1/6th the area of your pyramid.

Answer 8

Now:

Do you know the formula for finding the area of a triangle?

Answer 9

½ × b × h b

Answer 10

Sot of...you may have made a typo..it's:

1/2 * B * H

Answer 11

If you look at my kite, you'll see that both triangles share the same (B)ase of 12
The big guy has a (H)eight of 11m, and the little guy has a height of 6*sqrt(3)

Can you tell me the areas of these 2 triangles?

Answer 12

1/2 * 12* 11 = 66

Answer 13

1/2 * 12 * 6*sqt(3) = 62,4

Answer 14

Correct on both!! :-)

Now add them together. What is their sum?

Answer 15

128.4

Answer 16

Correct!! :-)

No if you remember, the first thing I did was to slit the pyramid into 6 equal pieces that looked like kites.

We just found the area of 1 of them.

All we have to do is multiply that area by 6, and we have the total surface area of your pyramid!

Answer 17

128.4 * 6 = 770.4

Answer 18

Bingo!!!

Now just look for that number (rounded off) in your answer list... :-)

Answer 19

thank you.:)

Answer 20

No problem! Glad I could help!

And thank you! :-)