congruent

Character	Displayed	HTML Code
plus or minus	±	& #177; or & plusmn;
dot product (center dot)	·	& #183; or & middot;
multiplication sign	×	& #215; or & times;
division sign	÷	& #247; or & divide;
square root radical	√	& #8730; or & radic;
function 'f'	ƒ	& #402; or & fnof;
partial differential	∂	& #8706; or & part;
integral	∫	& #8747; or & int;
nabla or 'curl' symbol	∇	& #8711; or & nabla;
angle	∠	& #8736; or & ang;
orthogonal or perpendicular to	⊥	& #8869; or & perp;
proportional to	∝	& #8733; or & prop;
congruent	≅	& #8773; or & cong;
similar to or asymptotic to	≈	& #8776; or & asymp;
not equal to	≠	& #8800; or & ne;
identical to	≡	& #8801; or & equiv;
less than or equal to	≤	& #8804; or & le;
greater than or equal to	≥	& #8805; or & ge;
superscript 2 (squared)	²	& #178; or & sup2;
superscript 3 (cubed)	³	& #179; or & sup3;
quarter	¼	& #188; or & frac14;
half	½	& #189; or & frac12;
three quarters	¾	& #190; or & frac34;