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#51 2013-09-23 03:31:11

demha
Member
Registered: 2012-11-25
Posts: 186

Re: Prisms and Pyramids

I have a rectangle, with a length of 7 and a width of 4:

15. What is the perimeter? - Answer: E
A 31
B 26
C 58
D 35
E 22
F 59


16. What is the area? - Answer: A
A 28
B 65
C 79
D 13
E 10
F 19


This rectangle just became the base of a regular prism, with a height of 6:

17. What is the lateral area? - Answer: F
A 119
B 873
C 256
D 349
E 332
F 132


18. What is the total surface area? - Answer: D
A 119
B 873
C 256
D 188
E 332
F 132


19. What is the volume? - Answer: E
A 651
B 327
C 395
D 221
E 168
F 342


20. What is the area of the largest rectangular side? - Answer: D
A 65
B 32
C 36
D 42
E 16
F 34


"The thing about quotes on the Internet is you cannot confirm their validity"
~Abraham Lincoln

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#52 2013-09-23 03:39:35

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 87,256

Re: Prisms and Pyramids

Hi;

For 13) you indicate that you need some help.

Triangularprismr.gif

You have:

h = 4
b = 6
l  = 8

V = ( 4 x 6 x 8 ) / 2 = 96

Answer is E.


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

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#53 2013-09-23 05:05:16

bob bundy
Moderator
Registered: 2010-06-20
Posts: 6,426

Re: Prisms and Pyramids

hi demha

Firstly Q6-10 are all correct.  Well done!  smile

Q11 and Q12 and Q14 are also correct.

I'll look at the last section in a new post

Bob


You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

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#54 2013-09-23 05:13:49

bob bundy
Moderator
Registered: 2010-06-20
Posts: 6,426

Re: Prisms and Pyramids

I have a rectangle, with a length of 7 and a width of 4:

15. What is the perimeter? - Answer: E
A 31
B 26
C 58
D 35
E 22
F 59

Correct.

16. What is the area? - Answer: A
A 28
B 65
C 79
D 13
E 10
F 19

Correct.


This rectangle just became the base of a regular prism, with a height of 6:

17. What is the lateral area? - Answer: F
A 119
B 873
C 256
D 349
E 332
F 132

Correct.

18. What is the total surface area? - Answer: D
A 119
B 873
C 256
D 188
E 332
F 132

Correct.


19. What is the volume? - Answer: E
A 651
B 327
C 395
D 221
E 168
F 342

Correct.


20. What is the area of the largest rectangular side? - Answer: D
A 65
B 32
C 36
D 42
E 16
F 34

Correct.


Well done.

Bob


You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

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#55 2013-09-23 05:44:27

demha
Member
Registered: 2012-11-25
Posts: 186

Re: Prisms and Pyramids

Hi Bobbym,
I actually just wanted help to do the equation my self, not have someone else do it for me big_smile but thank you very much!

And Bob I thank you too for your help!

Sent in the lesson and got 20/20.:cool:

Last edited by demha (2013-09-23 06:34:06)


"The thing about quotes on the Internet is you cannot confirm their validity"
~Abraham Lincoln

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#56 2013-09-23 08:21:31

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 87,256

Re: Prisms and Pyramids

Hi;

Very good result.


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

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#57 2013-09-23 18:53:29

bob bundy
Moderator
Registered: 2010-06-20
Posts: 6,426

Re: Prisms and Pyramids

hi demha,

Well done for that result!  smile

Bob


You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

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#58 2013-11-04 04:57:07

rogerwaters
Member
Registered: 2013-11-02
Posts: 85

Re: Prisms and Pyramids

What is the answer to number 5?
D or A? Or something else?


I think there are things in my story that have helped my creativity. Your father being killed, for instance, is one of the best things that could happen to a kid if he's going to write poetry or songs.
-Roger Waters

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