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#1 2008-04-15 17:23:47
- stellina91
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- Registered: 2008-04-15
- Posts: 12
Find an angle
Find the size of angle a in the diagram below, giving reasons.
Last edited by stellina91 (2008-04-15 17:27:34)
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#2 2008-04-15 17:43:18
- Dragonshade
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- Registered: 2008-01-16
- Posts: 147
Re: Find an angle
Since two sides of the triangle equals to each other, it's a isocele triangle(spelling,..cough...cough), the property of that kind of triangle is that QPR=PRQ=a
2a+42=180
a=69
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#3 2008-04-15 17:44:16
- stellina91
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- Registered: 2008-04-15
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Re: Find an angle
Thank you!!
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#4 2008-04-15 22:02:28
- John E. Franklin
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- Registered: 2005-08-29
- Posts: 3,588
Re: Find an angle
isosceles
igloo myrtilles fourmis
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#5 2008-04-15 22:40:23
- MathsIsFun
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- Registered: 2005-01-21
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Re: Find an angle
bless you
"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman
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