Today Class of 9A

Hey guys! So today after we correct the homework which was page 588 and the problems were 23, 24, and 25. We went on to our lessons called The Surface of Right Prisms and The Surface Area of Right Cylinders.
Also we got a packet that contains figures and we cut only one figure today though. But for all of you classmates out there DON'T FORGET THEM SINCE WE'LL NEED THEM FOR LATER CLASSES!
Now back to the lessons that we learn today, this connects to the figures that we were cutting. The figure below is the one that we cut today (It’s not exactly right or even congruent).

Now look at the figure, can you see that there is a big rectangle and the two bases? Also can you see that the green part equals a side of the base? And that if we get the length the rectangle that means we also got the perimeter of the bases? Also the red part is the height of the prisms. So in the end the big rectangle can tell you: perimeter of one base, the height of the prism, and area of the lateral area. Easy huh?


But we need some hand-dandy formulas!!!

So let’s say we want the Lateral Area then we'll use this formula:





And P= perimeter of one base

H= Height of the Prism

Later we need to use another formula to find the Total Surface Area which is:



Where
L= Lateral Area
B= Area of Base


Then we go on the next lesson which is Surface Area of Right Cylinders....

So pretty much the formulas are the same expect there are some minor changes where you should check twice

With the Lateral Area is:




Where

P= Perimeter/ Circumference which is if you have forgotten,

H= Height of Prism


Afterwards with Total Surface Area



Where

L= Lateral Area

B= area of bases (Base of Circle...)

And that is pretty much what we did in class today! So I hope you have a great weekend but don't forget these things

1. Bring the Packet to class because you never know when you may need them
2. Project Deadlines have been changed from Friday to Monday so you have at least one more weekend to work on it!!
3. Also with the projects, if you don't have class with Ms. Saatkamp on Monday, then find a way to give the project to her or else...
4. We have a make-up test this Monday, so if you sign up for it get ready!!!!

HAVE FUNNN! =3