Monday, August 19, 2013

Finding the angles

Its time for Geometry!
Try solving this question.

How do you prove that the angles of a triangle adds up to 180o?

There's a few way in which this problem can be solved.
1) By using a protractor and measuring all the angles and adding up the angles to prove that the angles of a triangle adds up to 180o
 
2) As 180o forms a straight line, another way to prove it is to tear out the angles of a triangle and put them together. If they are able to form a straight line, it will prove that the angles of a triangle adds up to 180o.

3) According to angles of properties, angle XBC= angle BAC (alternate angles). angle YBC= angle BCA (alternate angles). Therefore, angle XBA + angles ABC + angle YBC= 180o, which also means that angle ABC + angle BAC + angle ACB= 180o.

No comments:

Post a Comment