## Wednesday, May 30, 2012

### How To Make A Perpendicular Bisector

How To Make A Perpendicular Bisector
1) Open compass to just over halfway of the line segment.
2)Sharp point at point A make an arc.
3)Sharp point at point B make an arc.
4)With a ruler, join the 2 intersections of the arc.

That's how to make a Perpendicular Bisector

## Thursday, May 3, 2012

### New Circle Information

Circle Graphs (pi charts)- a graph made of a circle; a graph that represents data using sections of a circle.

Sector- is a section of a circle made up of 2 radii and an arc joining them.

EXAMPLE:

What percentage is the missing sector? 7%

TRY: 1000 kids were asked what type of music they like. Here's the result. How many kids like country and folk music?

Here's a Video to help!

Need Extra Help? Well Here You Go!

### Circles

Diameter is the distance across a circle through its centre

Some Examples:

Radius (radii is the plural) is the distance from the centre of a circle to its outer edge

Some Examples:

We can do the formula 2R=D this means that 2 radii are needed to make a diameter of a circle.
1/2 x D = R
D/2 = R
Example:

Here's a video....

This has some extra things but it's still helpful.

More Help? Then Check this out. (it has some extra stuff but it still helps)

## Wednesday, May 2, 2012

### Geometry #1

Parallel Lines are lines in the same plain that NEVER touch.

2 Examples:

Intersecting Lines are lines in the same plain that meet or intersect.

4 Examples:

Perpendicular are lines in the same plain that intersect at a 90 Degrees Angle

3 Examples:

Line Segment is a piece of a line with starting and ending points.

Example:

Try to name all the 7 line segments in this picture.

Here's A video..