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Jaymie S and Amy L

Page history last edited by PBworks 13 years, 5 months ago

Note:* if your looking for geometry just scroll down

 

 

 

 

Here are some important words that you should know the meaning of to understand Algebra a little better.

 

 

 

here is a list of words that mean Adding, subtracting, multiplying and dividing.

 

here are some sample questions.

 

1. 3 times a number is......  3n  <---Highlight

2. 3 more than a number is..... 3+n <---Highlight

3. 3 decreased by a number is...... 3-n <---Highlight

4. 3 less than a number is....... n-3   <---Highlight

 

Alge Tiles

 

 

Algebra is all about balance. What you do to one thing you do to the other.  It is also about finding a common pattern. Here is an example of finding a pattern.

 

This pattern is called "Toothpick Math." We first had to draw the next two triangles to complete the pattern. After, we created a table to show our findings. Finally, we than had to describe the pattern we saw horizontally and vertically.

 

 

 

After we had to create a graph.

 

 

 

A graph has to have a title, two sub-titles for the y axis and x axis, labeled axis', and the ruler going up and across.

The way to know which is the y axis is that "y" drops down so its the line going up and down or vertical.

 

When doing these types of sheets we also had to come up with an algebraic expression and equation like this.

 

 

 

we also used subsitution algebra for questions like this.

 

 

 

 

here is where the alge tiles come in handy.

 

For this type of question. (courtesy of Mr. Harbeck)

 

Picture 002.jpg  Click the thing to see the question.

 

Here is one of the perimeter questions for algebra.

 

Picture 003.jpg click

 

 

 

 

 

 

 

 

 

 

 

 

 

what is Geometry?

 

The hard definition that doesnt make sense....

 

The branch of mathematics that deals with the deduction of the properties, measurement, and relationships of points, lines, angles, and figures in space from their defining conditions by means of certain assumed properties of space

 

The easy definition......

 

SHAPES! squares, rectangles, circles, triangles etc.  Area, Perimeter, Angles etc.

 

This album is powered by BubbleShare - Add to my blog

 

 

The man they named the Pythagorean Theorm after. The theorem states that the sum of the squares of the two legs of a right triangle is equal to the square of the hypotenuse.

 

First of all, what is a right triangle?

 

A Right triangle is a triangle that has an angle of 90 degrees. It has a base, (b) an altitude (a) they make up the right angle, and a hypotenuse(c) usually the missing side.

 

 

 

 

 

Finding "C" is when the Hypotenuse of the triangle is missing. The formula to find "C" is .....

 

Here is how you would solve this triangle.

 

 

 

Finding "B" is when the base of the triangle is missing. The formula to find "b" is .....

Here is how you would solve this triangle.

 

 

 

 

 

 

 

Finding "a" is when the altitude of the triangle is missing. The formula to find "a" is .....

 

 

here is how to find a for this triangle.

 

 

 

 

 

 

To find the perimeter of a rectangle, triangle and square you add the measurments of all the sides.

 

 

 

 

 

 

 

 

Finding the perimeter of a circle is a whole different story. To find the perimeter or Circumference of a circle you have to know the radius, diameter and the magic circle number pi.

 

 

 

 

 

 

 

The Formula to find the circumerence is ...

 

 

 

 

 

 

 

finding the area of a square and rectangle are the same.

 

 

 

 

 

 

 

 

 

 

Find the area of a triangle.

 

 

 

 

 

 

 

 

Finding the area of a circle.

 

 

 

more to come for geometry, units not over ( explaination of surface area coming soon)

 

 

 

 

What is surface area?

Surface area is finding the entire area of a 3d object. We will show you how to find the surface area for a cube, rectangular prism, triangular prism and a cylinder.

 

first we will start with the cube since it is the easiest.

 

 

 

secondly, we will show you how to find the surface area of a rectangular prism.

 

 

thirdly, the triangular prism.

 

 

 

 

Finally for the cylinder. This is one of the more tougher ones to find the area of.

 

 

 

 

Here is the link to the blog where you can do sample questions. Hope the background information helps.

 

 

 

Grade 8 Class Blog 

 

 

Adding a little more stuff.

 

Here is finding the volume of a cube, rectangular prism, triangular, prism and cylinder.

 

Lets start off with the cube.

 

 

 

Now, for the rectangular prism.

 

 

Now for the triangular prism. These are one of the more trickier shapes because they give an extra measurment.

 

 

Finally the volume of a cylinder. There is no example but all the forumulas will be there.

 

 

  

 

 

 

 

 

 

 

 

 

Here is our unproject!

 

 

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