|
| 11 Apr 2013 07:05 PM |
| On a blueprint, a rectangular room 14 feet by 12 feet has a semicircular sitting area attached with a diameter of 12 feet. What is the total area of the room and the sitting area? |
|
|
| Report Abuse |
|
|
elfxninja
|
  |
| Joined: 22 Apr 2011 |
| Total Posts: 4609 |
|
|
| 11 Apr 2013 07:06 PM |
| What is the highet of the room? |
|
|
| Report Abuse |
|
|
elfxninja
|
  |
| Joined: 22 Apr 2011 |
| Total Posts: 4609 |
|
| |
|
behe42
|
  |
| Joined: 12 Mar 2011 |
| Total Posts: 335 |
|
| |
|
|
| 11 Apr 2013 07:07 PM |
@elf,
I guess it's just like
14 ft base, and 12 ft height?
it doesn't matter since it's multiplication i guess |
|
|
| Report Abuse |
|
|
| |
|
skyarex
|
  |
| Joined: 21 Mar 2010 |
| Total Posts: 12989 |
|
|
| 11 Apr 2013 07:08 PM |
You need a calculator for that. Make the semicircle a circle, and work out the area of that circle with pi x radius^2
So use pi x 6^2
Afterwards, half your answer, and then add it to the area of the square.
Then you're done. |
|
|
| Report Abuse |
|
|
IzzyReese
|
  |
| Joined: 14 Jul 2012 |
| Total Posts: 127 |
|
|
| 11 Apr 2013 07:09 PM |
| Well the room area would be 164 |
|
|
| Report Abuse |
|
|
skyarex
|
  |
| Joined: 21 Mar 2010 |
| Total Posts: 12989 |
|
|
| 11 Apr 2013 07:09 PM |
| So just get 14 x 12 and add it to pi x 6^2 |
|
|
| Report Abuse |
|
|
IzzyReese
|
  |
| Joined: 14 Jul 2012 |
| Total Posts: 127 |
|
|
| 11 Apr 2013 07:10 PM |
| Wait, what is the radius... I could do radiusx2 to get diameter, then I can use an estimated guess and do diameterx3... I usually don't do 3.14 cause my teacher wants us to estimate it. |
|
|
| Report Abuse |
|
|
|
| 11 Apr 2013 07:11 PM |
@sky
d00d this math is really freaking confusing,
i dont want to do it
all these shapes are weird
IT'S NOT HARD LIKE IT'S JUST BASIC STUFF BUT I HATE FREAKING CIRCUMFERENCES AND BLRGL |
|
|
| Report Abuse |
|
|
skyarex
|
  |
| Joined: 21 Mar 2010 |
| Total Posts: 12989 |
|
|
| 11 Apr 2013 07:11 PM |
I got 224.56
It would be easier with a diagram, but I am pretty sure that is the answer |
|
|
| Report Abuse |
|
|
IzzyReese
|
  |
| Joined: 14 Jul 2012 |
| Total Posts: 127 |
|
|
| 11 Apr 2013 07:15 PM |
| Ohh... It's a semicircle?? Hmm... Maybe radiusx2 (And that equals diameter) and then diameterx3 and then diameter/2 and that would get the area of the semicircle and then you add that with the 164 I got for the area of the room (I could be wrong with the area of the semicircle :\) |
|
|
| Report Abuse |
|
|
skyarex
|
  |
| Joined: 21 Mar 2010 |
| Total Posts: 12989 |
|
|
| 11 Apr 2013 07:16 PM |
| Is my answer right by the way? |
|
|
| Report Abuse |
|
|
| |
|
|
| 11 Apr 2013 07:20 PM |
14 feet by 12 feet has a semicircular sitting area attached with a diameter of 12 feet.
14 x 12 = 168
area of a semicircle = half of pi x radius squared = 1/2(pi)(36) = 1/2(113.09) = 56.55
168 + 56.55 = 224.55
there you go |
|
|
| Report Abuse |
|
|
skyarex
|
  |
| Joined: 21 Mar 2010 |
| Total Posts: 12989 |
|
|
| 11 Apr 2013 07:23 PM |
@Im
Come on, it isn't that hard :I |
|
|
| Report Abuse |
|
|
|
| 11 Apr 2013 07:27 PM |
I got 205.58
my teacher doesn't really check, it she just makes sure we do it. so uh
i still did it wrong |
|
|
| Report Abuse |
|
|