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#1 2007-01-09 04:06:04

Neha
Member
Registered: 2006-10-11
Posts: 173

Degrees

Find Angle A if three times its complement equals 150degrees .


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#2 2007-01-09 16:19:16

pi man
Member
Registered: 2006-07-06
Posts: 251

Re: Degrees

An angle plus its complement is always equal to 90.   In this case, 3 times the complement is 150 degrees, so the complement is 50 degrees.  50 + A = 90, therefore  A = 40.

Last edited by pi man (2007-01-09 16:19:54)

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#3 2007-01-09 16:20:26

Toast
Real Member
Registered: 2006-10-08
Posts: 1,321

Re: Degrees

Well, seeing as complementary angles add up to 90 degrees and you have three times one of the angles, you can draw these algebraic conclusions:

1.

2.


re-arranging gives:

You can now use simultaneous equations to find angle A.

EDIT: Guess pi man beat me to it tongue

Last edited by Toast (2007-01-10 16:24:42)

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