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April 19, 2014

April 19, 2014

Posted by **joan** on Monday, March 25, 2013 at 8:40pm.

30-60-90 triangle theorm

- math -
**Reiny**, Monday, March 25, 2013 at 9:14pmIn an easily accessible part of your notebook

make a sketch of a 30-60-90 triangle, and put in the values

1 opposite the 30°

√3 opposite the 60°

2 opposite the hypotenuse

MEMORIZE THESE VALUES

(the smallest is opposite the smallest angle, etc..)

Do the same for the 45-45-90 using sides

1 - 1 - √2

now tanØ = opposite/adjacent or y/x

tan 30 = 1/√3 , look at your triangle

tan 45 = 1/1 = 1

check with your calculator

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