Why do I need to know how to identify triangles by their sides and anlges?

How steep is this hillside and will it fail? How high is that mountain? These sorts of questions pop up all over in geosciences – from plate tectonics to maps to ocean waves, and they require you to find either an angle or a distance. To do this, we often use geometry, which is much easier when a right triangle is involved.

A right triangle (like the one in the figure to the right) has one angle that is 90

°. The other two angles are always less than 90 ° and together add up to 90°. Note that the triangle on the right has 3 angles a, b and c and 3 sides, A, B, and H, and 3 angles a, b, and c. The side “opposite” an angle (in this case) is labeled with a capital letter corresponding to the label on the angle. The side opposite the right angle, H, is always the longest side and is called the hypotenuse.[Image]

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This entry was posted on December 4, 2009 at 3:06 pm and is filed under Uncategorized. You can follow any responses to this entry through the RSS 2.0 feed.
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December 5, 2009 at 5:40 pm |

This doesnt really talk about a real life situation but. I can see how you use triangles when your talking about how steep a mountain is or something.

December 7, 2009 at 1:08 am |

This was a little confusing. The first part made more sense than the second part about mountains and hillsides. It’s not really real life though.

December 7, 2009 at 2:45 am |

The mountain and hills thing would make sense if you were a rock climber or something. The bottom part doesn’t really seem like real life to me.

December 7, 2009 at 3:08 am |

The top part seems a lot less confusing than the bottom. It doensn’t really have a real life reference in there it is mostly just all technical stuff.

December 7, 2009 at 1:42 pm |

the top part seems real life the bottom doesn’t good job anyway