the only approach for system of ineq is 2 try pt.s

identity means LHS---RHS for all possibe unknowns

(cosx)^2=1
how many roots?

smiliar 3D should also prop with all their size

when operating reflexing,
bear in mind the side length

from x^0.5 to x
it seems take sp or log are the only ways

(a-b)x^2 + (b-c)x + (a-b)
deta=0

Rhombus

<table width="100%" class="ts" style="border-collapse: collapse; "><tbody><tr><td id="tDataImage0" align="center" nowrap="" valign="bottom" width="25%" style="color: rgb(0, 0, 0); font-family: arial, sans-serif; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; "><a href="http://images.google.com/imgres?imgurl=http://thesaurus.maths.org/mmkb/media/png/Rhombus.png&amp;imgrefurl=http://thesaurus.maths.org/mmkb/entry.html%3Bjsessionid%3DF8B7AA740888A872AC233D098B30FEC3%3Faction%3DentryByConcept%26id%3D40%26langcode%3Den%26expand%3D0&amp;usg=__1VMFiQBzatTAqfXDbH2a-KfTABk=&amp;h=300&amp;w=300&amp;sz=19&amp;hl=en&amp;start=1&amp;sig2=mwuI7LWLWejMlbaBEFsy1Q&amp;um=1&amp;tbnid=MkQ5E4uPU4_SVM:&amp;tbnh=116&amp;tbnw=116&amp;prev=/images%3Fq%3Drhombus%26hl%3Den%26sa%3DN%26um%3D1&amp;ei=p7ruSfLcNYSQ6AO17-XoAw" style="color: rgb(0, 0, 204); font-family: arial, sans-serif; "><img src="http://tbn1.google.com/images?q=tbn:MkQ5E4uPU4_SVM:http://thesaurus.maths.org/mmkb/media/png/Rhombus.png" width="116" height="116" style="border-top-width: 1px; 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parall's dignal not always bisect the angles

some qu with time should think at initily&nbsp;

Trasformation and Symmetry

2D
&nbsp;&nbsp;Transformation
&nbsp;&nbsp; &nbsp;Reflection
&nbsp;&nbsp; &nbsp;Rotation
&nbsp;&nbsp; &nbsp;Translation
&nbsp;&nbsp; &nbsp;Dilation &nbsp; (scale factor)
&nbsp;&nbsp;Symmerty
&nbsp;&nbsp; &nbsp;Reflectional symmetry
&nbsp;&nbsp; &nbsp;Rotational symmetry
3D
&nbsp;&nbsp; Cube and&nbsp;Tetrahedron
&nbsp;&nbsp; &nbsp; &nbsp;Planes of reflection
&nbsp;&nbsp; &nbsp; &nbsp;Axes of rotational symmetry
Nets