### Intro to Geometry - Nov. 14, 2005

**Hello everyone! This is the first scribe post for our new unit on Geometry!**

**Today's class was spent reviewing some things about geometry we've already learned (like how to find the volume of a retangular prism) and then learning some new things (like the formulas for the surface area and volume of a sphere.)**

**At the beginning of the class, Mr. K put up eight questions for us to solve.**

**The first of these questions involved "plugging in" number values for variables (ex. a = 2, b = 3, c = 5 so... abc + 2ab = 42.)**

**The next questions required us to find out the value of variable (ex. x^2 + x^2 = 72 so.... x equals 6.)**

**The last of the questions were about solving the volumes and surface areas for a rectangular prism and a cylinder.**

**Next, Mr. K. explained the "baseball theorem" to us. This theory explained why the surface area formula of a baseball (also known as a sphere) is 4(pi)(r^2).**

**Lastly, he explained the volume formula for spheres, which is: 4/3 (pi)(r^3).**

**Our homework for tonight is Exercise 23...yes, the whole thing.**

**The scribe for tomorrow will be.....**

**nee-cole !!**

## 4 Comments:

Great graphic Kim!

BTW, the volume of a sphere is:

V = (4/3)πr^

3I am impressed by your graphic! I teach middle school in Alabama and was referred to Mr. K.'s blog through a mutual friend. He is doing great things in his class, isn't he? How do you feel about blogging as an assignment and using computers for class so much?

It's coooOOl!

I think it's really cool, blogging as an assignment and using computers for class. I mean, we're in a really hi-tech era, technology is advancing so fast, and I think we should use technology as an aid in our studies.

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