Friday

December 19, 2014

December 19, 2014

Posted by **julie** on Sunday, December 7, 2008 at 11:03am.

- math -
**drwls**, Sunday, December 7, 2008 at 11:19amA reflection about both the x and y axes will move a point to the opposite side of the origin (180 degrees away), and the same distance away from it.

Hence there is symmetry of a set about the origin, if there is symmetry about the x and y axis.

This is probably no a "proof" in words that set theorists would prefer.

**Answer this Question**

**Related Questions**

math - Prove that if a subset C of R*R is symmetric with respect to both the x-...

maths2 - Test the equation for symmetry with respect to the x-axis, the y-axis, ...

Math - Is the following function symmetric with respect to the y-axis, symmetric...

Pre-Calculus-check answers - The graph of the equation y=x^3-x is symmetric with...

trigonometry help please :( - 2) Simplify √-1-4/5-√-1 A.-1/24+19/24i...

Math Analysis - Tell if the function is symmetric with respect to the x-axis, y-...

Pre-Calc - Could somebody please check this for me? Dtermine whether the graph ...

Trigonometry - 1. Which of the following statements are true? (i) r = 4 – 3 sin...

Trigonometry - 1. Which of the following statements are true? (i) r = 4 – 3 sin...

Algebra - For each equation, determine whether its graph is symmetric with ...