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

demha
Member
Registered: 2012-11-25
Posts: 172

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: 83,251

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.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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

bob bundy
Moderator
Registered: 2010-06-20
Posts: 6,269

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: 6,269

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: 172

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: 83,251

Re: Prisms and Pyramids

Hi;

Very good result.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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

bob bundy
Moderator
Registered: 2010-06-20
Posts: 6,269

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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