Mathematics (Science & Mathematics) - 27 June 2006

I know that A right triangle has line symmetry, but does It have Point Symmetry?

The Def. of Point Symmetry is Point of rotation (according to The Teacher).

Point of Rotation: A figure in a plane has rotational symmetry if the figure can be mapped onto itself by a rotation of 180 degrees or less.

Rotation: A type of transformation in which a figure is turned around a fixed point, called the center of rotation.

Using these definitions, I know that if you rotate the triangle less than 360 degrees, you don't have symmetry (the figure is not mapped onto itself). Can you however rotate the figure 0 degrees, in which the figure is mapped onto itself? I believe that this follows the defs., and I realize that this gives every figure a point of symmetry (But couldn't this just be a type of reflexive property?). Is there a theorem somewhere that says that a rotation must be greater that 0?

2006-06-27 12:01:50 · 4 answers · asked by ipndrmath 4

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can anyone answer this math equation? (intermidiate alg.)?

If you have 20 gallons of 10%, how many gallons of 70% do you need to mix to have a total mixture of 50%

2006-06-27 11:48:14 · 4 answers · asked by boo 1

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solve inequality?

Solve the inequality in terms of intevals: 4x< 2x + 1 ≤ 3x + 2

2006-06-27 11:21:50 · 8 answers · asked by stillborndesires01 1

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If the average for a test was 74% and the standard deviation was 13, are you within 1 SD if you scored a 62?

2006-06-27 11:00:52 · 4 answers · asked by spotgirl02 1

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If I post all my homework questions on this site, will you answer them for me?

Just curious

2006-06-27 10:31:44 · 48 answers · asked by Airplanegirl 6

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What is the exact number of pi?

2006-06-27 10:24:07 · 25 answers · asked by Typhlosion 2

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I have 5 tickets in a drawing of 2000 total tickets. There are 20 tickets to be drawn, what are my chances?

2006-06-27 09:55:19 · 6 answers · asked by Anonymous

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Help please?

What is the graph of 4x^2 + xy + 4y^2 - 8 = 0

Is this an ellipse, hyperbola, a parabola, or a line
How can u tell which 1 of these it is?

2006-06-27 09:31:49 · 7 answers · asked by Anonymous

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How do you find the derivative of "y = x to the power x to the power x to the power x" (y=x^x^x^x)?

I want to know the steps. I got badly confused after first taking the ln on both sides.

Hopefully the question is clear. There are no parenthesis between the x.
If there is any confusion, this will clear it out.
Eg. 2^2^2^2 = 2^2^4 = 2^16 = 65536

2006-06-27 09:08:00 · 8 answers · asked by Xtreem 2

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