Drexel dragonThe Math ForumDonate to the Math Forum



Search All of the Math Forum:

Views expressed in these public forums are not endorsed by Drexel University or The Math Forum.


Math Forum » Discussions » Education » mathedcc

Topic: mathcounts no-trig question
Replies: 7   Last Post: Jan 10, 2012 11:35 AM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
Guy Brandenburg

Posts: 81
Registered: 1/30/05
mathcounts no-trig question
Posted: Jan 9, 2012 8:17 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply
att1.html (1.0 K)

Found this question on an old Mathcounts test - a portion where calculators aren't allowed.

I know the answer (3/4), which I got by using illegal methods (calculators, sines, and cosines), but I can't figure out how one could figure it out just using brain, paper, and pencil.

The question poses a 75-15-90 triangle whose hypotenuse is given as the square root of three.

The goal is to compute the area.

Any hints or suggestions would be welcome.
 
Guy Brandenburg, Washington, DC 
http://gfbrandenburg.wordpress.com/
http://home.earthlink.net/~gfbranden/GFB_Home_Page.html
============================



Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© Drexel University 1994-2014. All Rights Reserved.
The Math Forum is a research and educational enterprise of the Drexel University School of Education.