Andrea's BOB

The Volume of A Rectangular Prism




Volume: the amount of space occupied by an object is called volume.






The volume of a rectangular prism can be found by the formula:





VOLUME = LENGTH x WIDTH x HEIGHT




HEIGHT= 35 cm(3)
LENGTH= 13 cm(3)
WIDTH= 44 cm(3)

All you need to do multiply 35 cm² x 13 cm² x 44 cm²= The Volume.

V= 20020 cm²(3)







ANOTHER WAY TO FIND VOLUME:





To find volume you can use the formula:

BASE X HEIGHT

The base of the prism is a triangle, so we need to find the area of the triangle.

Area of the triangle = 1/2 x 8 x 4 = 16 cm(3)
The height of the prism is 12 cm(3).
Volume of the prism = A x H = 16 x 12 = 192cm(3)









THE SURFACE AREA:



How to find the surface area?



Every net conatins a top, bottom, front, back, and a right, and left side.











































H= 30 cm(3)
L= 20 cm(3)
W=10 cm (3)

What is the surface area?






Top & Bottom= 2 (lxw)


Front & Back=2 (hxl)


Right Side & Left Side= 2 (hxw)





To get the measurments for each part of the net you need to follow steps above in brackets and multiply your answer by 2.


Top & Bottom=400cm(3)


Front & Back=1200cm(3)


Right Side & Left Side=600cm(3)





Now add all of your answers together to get the surface area:


400 cm(3) + 1200 cm(3) + 600 cm(3) = 2200 cm(3)

David's Scribepost

On April 10th 2008, we learned how to get the Volume of a cube or rectangular prism.


We found the volume of the cubes / rectangular prisms that we had as our nets on the pink sheet. We're suposed to have this done and so we can hand it in on Friday, April 11th.

So what we did was cut out the shapes of the nets we made, but then this time instead of glueing it flat on the paper, we made an extra flap so we could tape it together, and turn it into a cube that we could fold up or down when we needed to.

Now that, that was done, we did the actual work to figure out what the volume is.

There are two ways we could figure out the volume, one was multiply all of the measurments of the cube or rectangular prism. By that I mean Length x Width x Height, not the cm squared but how many cm it was on the side of the cube or rectangular prism. If the cube had a 3cm length, 3cm width, and a 3cm height, then we could do 3cm x 3cm x 3cm = 27cm cubed (we use a little 3 to represent cubed and we use it to know we're talking about something in 3 dimensions).


You could do the same thing with a rectangular prism except you would have different numbers for the legnth, width, and height. Another thing we could do is Base x Height, your base is usualy the width x length. This solution is a little different though, you can represent it in a different way. But you would find out what the base is first, so usuing the cube again, it would have a base of 9cm squared, multiplying that by the height (3cm) would get us our volume of 27cm cubed. It would look something like this if you wanted to draw it out.



The pink sheets are due so I hope you get all of this on your sheets!







Hope you Finnish....

danica's scribe

This is the first solution on how to find the volume of a cube

This is the second solution

emilyr's scribe/.

Today in class we did an activity where we made nets for shapes we got out of a bucket. We made the nets on grid paper so we could show the square centimeters and it was labeled too. We then cut them out an pasted them on our notebooks. We were supposed to solve all the shapes but we didn't have enough time. .

Tasha's Scribe Post

Today in class, our job was to to make "nets" for 3D shapes. We drew the nets on grid paper so the shapes can be accurate in square centimeters, we also had to label them. After we cut them out we glued them in out math notebook to solve.

Below are few of the shapes I did:

Homework

Finish colour-coding shapes, and label them. Put them in your math notebook.

( counts as marks :] )

Vicky's Scribe Post

Today in class we learned how to find the surface area of a Rectangular Prism by adding all 6 sides, left, right, top, bottom, front and back.

This is a picture of a Rectangular Prism





Net - A disassemble box, or unfolded box.

*Note

Net is 2D

Rectangular is 3D

Pythagoras growing post

pythagorean triple
A pythagorean triple is 2 perfect square numbers when added together, equals another perfect square. You can use it to see if a triangle has a right angle. Use this formula: A2+b2=c2.
you can also use this perfect square chart to find out the squares in between