Maths

This week we are working on number patterns. The class also had a quiz on mean, median, mode, and range.
 * 22/11/2011**

I would like you to find the mean, median, mode, and range for the following problems:

a) 10, 14, 12, 11, 13 b) 21, 29, 31, 40, 29, 30 c) 7, 9, 6, 7, 3, 2, 9, 6, 5 d) 4, 7, 1, 6, 3, 2, 7, 10 e) 7, 14, 9, 6, 12, 11, 13, 11, 7

__Patterns__ When you have a list of numbers and you can predict what will come next, you call it a pattern. For example:

2, 4, 6, 8, 10, 12

What do you predict comes next? 14! So what's the pattern? You add 2 to each number to get the next number. Here is another pattern:

1, 2, 4, 7, 11, 16

Can you predict what number comes next?

Yes? No?

The next number in the series is 22. Why? Here is the pattern: +1, +2, +3, +4, +5, +6, etc. In other words, the list starts with the number 1. Add 1 to 1 to get 2. Add 2 to 2 to get 4. Add 3 to 4 to get 7. Add 4 to 7 to get 11. Add 5 to 11 to get 16. Add 6 to 16 to get 22.

Here is a worksheet that you can print out and work on:

When you are finished, please scan it and post it here. If you don't have access to a scanner, you can write the answers in a word document and post it here.

I hope that all is well!

Mr. Tom

Nicolas, in maths this week we are learning about regular vs. irregular polygon.
 * 25/10/2011**

__**A regular polygon is a polygon whose sides are all the same length and whose angles are all the same**__ -In order to prove that a polygon is regular or irregular, you must measure every side and angle of the shape. -The angles of a polygon are located at the vertices. For example, a square has 4 vertices and all of them are right angles (90 degrees). You must use a **protractor** to measure each vertex of a polygon to see what the **angles** are. -You must use a **ruler** to measure each side of a polygon. -If all of the sides are the same length and all of the angles are the same, you have a regular polygon. If any number is different from the rest, it is an irregular polygon.

//**Instructions:**// Download the following worksheet:

Print out the worksheet. Measure the sides and angles of all of the polygons. Write the length of each side of each shape and the measurement of each angle inside the shape. For a square, you would right 90 degrees at every corner and the length of each side next to the sides.

After you have measured each shape, get out your maths notebook. Make a table with two columns. One column will say REGULAR POLYGONS on top and the other column will say IRREGULAR POLYGONS on top.

Cut out the shapes that you have measured and paste them into the correct columns. A square would go under the REGULAR POLYGONS column.

Finally, write the name of each polygon. A polygon with 5 sides is called a pentagon. If all the sides/angles are the same, it is a REGULAR PENTAGON. If they are different, it is an IRREGULAR PENTAGON. A polygon with 4 sides is a rectangle (if it is regular, it is called a square. If it is irregular, it is an irregular rectangle). Any shape with six sides is called a HEXAGON. Any shapes with seven sides is called a HEPTAGON. Eight sides- OCTAGON. Nine sides- NONAGON. 10 sides- DECAGON.

Good luck!