Question

Help? I will fan AND medal :)

Answer 1

1. Calculate the surface are of a regular triangular pyramid with the base edges of length of 12 and a slant height of 12. (Hint: Remember that the base of a regular triangular pyramid must be an equilateral triangle, not necessarily congruent to the sides of the pyramid.)

2. Approximate the volume of the regular triangular pyramid in problem 3 if the height is approximately 11.5. (Hint: Remember that the base of a regular triangular pyramid must be an equilateral triangle, not necessarily congruent to the sides of the pyramid.)

Answer 2

Answer choices for 1:

a. 72
b. 216
c. 278.35
d. 288

2:
a. 239
b. 276
c. 717
d. 828

Answer 3

@ninjasandtigers

Answer 4

D: An hour and a half of work

Answer 5

SA: 1/2bh(number of sides)
SA: 1/2(12)(12)(4)
SA: 1/2(144)(4)
SA: 72*4
SA: 288

Answer 6

Thanks:) One more and I'm finally done!! This class will be finished thank god

Answer 7

Oh, actually I forgot there's one more

Answer 8

thats fine :)

Answer 9

SA: 1/2bh(number of sides)
SA: 1/2(12)(11.5)(4)
SA: 1/2(138)(4)
SA: 69*4
SA: 276

Answer 10

oh my gosh that's a lot of work!!

Answer 11

Here's the third and final:

If a cone has a height of 5 inches and a volume of 135 pi^2, find the diameter of the circular base.

a. \[3\sqrt{3}\]
b. \[6\sqrt{3}\]
c. 9
d. 18

Answer 12

And I know! So much writing, and that's just one side of the paper:P

Answer 13

i think it's c but im not sure...

Answer 14

Well that's better than nothing haha! I'm gonna submit this online and then I'll tell you if it was correct:)

Answer 15

ok :)

Answer 16

Grrrr it was wrong but I got an 83% so yay :D

Answer 17

which on was it?