Friday, July 17, 2009

Have you wondered how to apply the properties you learn for circle?
Fret not.
Here are some examples of how you can apply the property: Tangent from external point
in real life situations.

Party hats:

As you can see, a circle shape (in white) can be drawn in the party hat. That makes the side of the hat (coloured in pink) touch the circle. This forms a tangent perpendicular to radius. *You will learn more about it in the following property* Since the tangents can be extended, there will be a point where the 2 tangents meet. Since the tangents have started out from the same point, the length of the tangents (from the point where they touch the circle to the point where the tangents meet) will be the same. That forms an isosceles triangle. If a line is drawn down from the tip of the and join to the radii of the circle as shown on the diagram, the 2 angles at the tip of the tangent (in white) will be the same.

Done By: Chen Liyun