Scribe Post for October 13

Tuesday, October 13, 2009
Hey everybody. Welcome to the scribe post for October 13, 2009.

Today in math class, we reviewed some of the questions that we didn't understand from our homework on Monday. One of the questions we that we checked over was CYU question 1b. In this question it tells us to make 2 different solid objects using 24 interlocking cubes. You then have to slide the two objects together, and identify the area of overlap between the two objects.










To find the area between the overlap of two objects, take the area of the object that has the smaller height and width and multiply that by 2. In this case you have to multiply 4 by 2 to get your answer of 8.

After we were done checking over our h.w from last class, we were given a shape that we had to find the exposed surface area on. Remember that exposed means only the faces that you would be able to see if you were to walk around the whole object. This is very important because it will be on our test tommorow!
Here is the shape and the measurements.











To find out the surface area for this shape, you are first going to need to find all of the measurements you possibally can with these given side lengths.
The first thing that I did was find out the measurement from the dotted line in the triangle, to the edge of the triangle.










To find out this measurement of this side lentgh I divided the base mesurement by 2 to get me an answer of 6.

After I got an answer of 6, I needed to find out the side length of the dotted line from the base of the triangle to the top of the shape.











To do that I subtracted The height by the base to get me an answer of six again. I did this because the dotted line is equal to 15 and 9 cm is already being used by the height. Since there is only 6 more cm left to the dotted line, that must be the answer to what I am looking for.










After I got all of the measurments needed to find the last side length, I did Pothagoras to find it out the last side length. For the last side I got a measurement of 8.5 cm.



Once I had all measurements possible, I calculated the surface area of the whole shape except the base face, and got an answer of 988u squared.
That is all I have to say! Thank you and have a great day!
(oooooh that rhymed)

10 comments:

JosephD 9-05 said...

Good job Jai! You explained the questions really well. But you forgot to add what's homework for today.

simran 9-05 said...

Good Job! You made some grammar mistakes in the first paragraph, like Joseph said you forgot to put the homework on. Also you didn't mention who the next scribe is. Again Great job!

Mr. B. said...

Does anyone want to comment or post on the problem with the rectangle in the middle missing?

angela905 said...

Good scribe Jai! Excellent pictures and explanations. I agree with Simran and Joseph. You forgot to put the homework on, and you had some grammar mistakes. By the way who's the next scribe?

Lissa 9-05 said...

Thank you for posting up this scribe Jai! I like your pictures. One thing that I think you should do is check over your work because there are a bit of spelling mistakes and post up homework.

kara 9-05 said...

Nice job Jai! I really liked how you explained the whole area of the house thing! But who is scribing next?

xtian 9-05 said...

good job Jai, you explained it very well, but you have some grammar mistakes like angela said, by the way who's scribing next?

Aleiah 905 said...

Good job Jai but you had some mistakes in spelling... The explanation was still good though.

Kim9-05 said...

oh thats nice!^^I like the pictures you put to explain it. You do have som grammer mistaks but I guess thats okay!well you did forget to put the homework...well good job though!

Zerlina905 said...

Good job Jai! It was alright excepted you should have added more colour and it would have been better. You made a few spelling errors. You also didn't put in the homework but overall it was great!

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