And to protect you from it, you can use the following lucky clover charm (polar plot r=cos(2theta) ): https://www.wolframalpha.com/input?i=+plot+r%3Dcos%282the

And to protect you from it, you can use the following lucky clover charm (polar plot r=cos(2theta) ): https://www.wolframalpha.com/input?i=+plot+r%3Dcos%282theta%29 https://www.wolframalpha.com/input?i=+plot+r%3Dcos%282theta%... whose perimeter can also define a constant 4*E(-3) ~ 4 * 2.4221 https://www.wolframalpha.com/input?i=plot+r%3Dcos%282theta%29+from+theta+%3D+-pi%2F4+to+pi%2F4\ https://www.wolframalpha.com/input?i=plot+r%3Dcos%282theta%2...