https://tube.geogebra.org/student/m8028
http://www.google.de/imgres?imgurl=http%3A%2F%2Fwww.brinkmann-du.de%2Fmathe%2Fgost%2Fdesigner%2Fdes_214.gif&imgrefurl=http%3A%2F%2Fwww.brinkmann-du.de%2Fmathe%2Fgost%2Fp40_winkel_01.htm&h=189&w=153&tbnid=MRvpUIK9E8ZIMM%3A&zoom=1&docid=flrqWsmrKMR0bM&ei=5Xo8U8XkFoWYtQaC8IFA&tbm=isch&client=firefox-a&iact=rc&dur=1885&page=2&start=23&ndsp=29&ved=0CK0BEK0DMBg
4587×25.35=116280.45
√900=√9×100=3×10=30
√200=√2×100=10×√2