CINXE.COM
Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol,Noto Color Emoji}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;max-width:60rem;padding-left:1.5rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{font-size:1.5rem;font-weight:500;line-height:2.25rem}@media (width <= 720px){.h2{font-size:1.25rem;line-height:1.5rem}}#challenge-error-text{background-image:url(data:image/svg+xml;base64,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);background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme:dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="120"></head><body class="no-js"><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt={cvId: '3',cZone: "publications.waset.org",cType: 'non-interactive',cRay: '917958892ac28368',cH: '995gphDtp_qeFtXOSP7u092ufoSj3HanVQHYKX6oi1Q-1740503814-1.2.1.1-EF0z.mT_p_KH6Vt8ojbG3SwyXdQ9bf2E1EfP3LSf4RneBmi7OnAydK9By5Ngjj8b',cUPMDTk: "\/abstracts\/search?q=Geogebra&__cf_chl_tk=MVQg2KqI_eLtOfNAz5ueGzlBeU38bnzr.D9aitrtGk4-1740503814-1.0.1.1-b0plAINzESTBNJMezRt5_YXZgD7WWsw4by63SVDV_hc",cFPWv: 'b',cITimeS: '1740503814',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/abstracts\/search?q=Geogebra&__cf_chl_f_tk=MVQg2KqI_eLtOfNAz5ueGzlBeU38bnzr.D9aitrtGk4-1740503814-1.0.1.1-b0plAINzESTBNJMezRt5_YXZgD7WWsw4by63SVDV_hc",md: "rrs2VSGHozWUeSCuAjvRmyWBNRxcLOr7zmvKluJPNv0-1740503814-1.2.1.1-.72wCNohmoO9fDVvxQGU1ApQfN3s6nElIlZPX0Cl2jFNw_ekpzeJYa23wt2M37BsN1j4aJQdQPcctTNed8oZATjXozSDK33Z6mWXFHdIPFSY2PxNxtdxKNX0IXZfhrpnQVS8bYlZ8JT6PE3_w8Vhe4mp969XQOdrkyEdtzjZ3aYnKmTdiKLlrGr.oSm43RyIghyx1BWIkHh4CEYsENXCZCES4.bWr1TSaXw1BWi_3tKNZ42l2RpUAtiNJ_Sy2qQIdHjbJAb9kH8aSTQnh1quEyaT8K0XBJ_PHg6BqeRycdfeeFswQ0pf.1qa86ClpdVajjqjjuSmTwgn6s57Qp54acJhPhfLez85G4OxYrdaU_PevPIWWeoJVVXoZJyJbEYAK4sOYpIJSDseUneXK9pHEbjADa8zYuOp.pTVvs2gfv9X1no667lI4WkoZMOdUiGCaSFmky.s0Wvd62y0evylY6jmLhM8PXMfDHaN6hv.coXghqBATVcg4Z2EK7f1zfzyHGUf.sTBljE7kafK9t0wAPD7oZGmNAtbz72.6wZIPkbVXn5L5td2bOP8mJAwEuVQ9Mr_EAslDh_j7YomY3aQDfal40ASnkX2fZs0lPittHtbwl7AKi8MurdfKpaxKASaM.la1tM4.pSno2IsEvMOOk3QyuGrYGl2Ryqza_vJbgUyeOg3kdvKSMPSLRKIHmJPq1Ixm3RH7rrvzGeYu685YXesW4ivzNWBT1KHrF4yrMDx.R_cppr8g1qiWuC1.eQDC8fXvcSkoyGMZ8_DfsfaqvhHhfH0k3GhqA7hWWYSpn43ftpdXB33XvY2drOuEPPol8PBu2M6x5ly_037XtrzOekfbR56hScFXG8tnKq558J3c3hXdl_BpdiRLZaRvBsc2uGubI__KZ.pDEO819CL3Z514S5cCCEmKR2yYfQcjLUV_a2BOhSC9HDQa7MSQ4gsBAMAWivg98vdCw4Q1f8JDeLOJASKG3ihR1iiAkxJrH_QyvQiNVewOJlZWv.KXgQlhhoztFDxRElvqwrIh84dIL2GwzgCXPxd8ZjF3H1q8mi.EDrhteHQ2cVp7LDT_ZsPK6d8cEHGmhz0U86lF4aWuF8KvKtH8KDvzQxYQVNjk8CGRTbZ84mmISirGyXkRCQLfxoalEVZXLdE0ljL9wcoSbH8WOzoRcsYOni.rlqfdT_WMAb3wiz24_uXbKTK8Dw_Y2xvoQ2etR_pxSKXCYu.mpWJYeAkP8HwZL4EqlsqgjAPpAyw2zPjJ0_bhrvO8T297Gb2nr8YIL1jN5MTAk.h38zHYj8eII3Xx1X7orwkkDH9a8hLUanL.W.duDY4CiTeHsu8r1j3rfK60T3ErjnsFdmEyp4IDAo1Nt8sBKrgS3KlWBkD7eIjbnPuXwDDJbGfv0A5yClUNxhuwOht8cos0a_Ho__pJ7EwQPXVNX9X195nz8hbMvEtHLhJGe5ed.7RrXxekB2SxcZeSOXoid2efEpDH71UYbokk3sFxb3EeLfJxLEvD4u2_vN5GOOsDfP_z1ZNpwiB1q6yGWVZhtuoE_8Zcr0jiL.1qEH3FN9LQzIUaGLFci9iRTIfvUMG2rv1QgMe_wSL8FwAQZJ6BW.tQfgTMdJsx_FlOuEdgR6Koj7qYCySPonyyipH.z0h2D3hUhZFgY4m9RKrmDS79ydOyevJaeaJ2QECDsIiqrh1XF0Xysn7APSM2xAYWx6d_dUJmz4HBGi5HEMJpYdX1WOcuT6fv7X6_9zozW8sEm68fq_PkG3sq1uPlRTqNo.cL0bMY6bg.Tm5tOYGVii_E93zUo4oDQ3VG7M.YTTL.aoGpdy3_Ml8T1iXwHBrWvqr2.QCbevYTQINvM_hvvHl4KzoILkDtbBTBYOgb1wUTw1Jc0zomc.QqVA.OOHx7kEhTF0U6LtE7b6vbdx9OQS5er7ehQ",mdrd: "GJQPlfoUXzlmARYcfvS9POIStdmMuZnQasiqI3669Qs-1740503814-1.2.1.1-DSUUL5LXBF4KYOb0rwbKsxdFkYr51ReNvpyHcdQ0ILUfRECfM8oOWVaWxFSMhHqtS1Lm6MfEnbCU0O7Sr8lDb59gj27mbgZes_trV.31zW3Bv.VmV80uddGsdKVv2wFtH12Df19rfH5sGDA6NW0GiOfSA7kLOCKfyLSiABoRZG01F6GOSx9m7pMsMfP.MSRkJrfI9HDeWr032tOBUgfww2BFtQLhWZa3r2YlbToFs0uTG7dNQ3mPnNatnYhPT7rSDx5xF2ISMG.2eOfz7SXlswvw2w8vHQRAnADxkWaPVJKMe3qws8Lw0fyjvKHJFcNdE_nzM4_Vl2J59XO79r3GMbPBYqZGmc65O8TB_6iX56DpS3Tl1.BjrKeVj9PksfbeWtyhY.wUVsAQki_sYQ.ZCaS0gd9owKlmLskGAYe87VdxYqUj9TIrMJ3PqGWJ63YHIAM81DTqr8bb8VlB8BBSFkMfcC9HxZq_e3reQMwGhfrvXBRpBr_DccnfgIkLrjJhAujB9m.In7pmDEHb_pNaeOZjnsJcLvSvW_LoNHTEwgkTf0Uh88EGQnuXyQoALOq3cXyuFlaU45oX1X1cSrzl3xMP76216zsc.s5ZcOrZamB9lcjT7aaKdKNklDlcS54bYt4mg.kwTcfxql4Fd0fjHATJZl46W3.IJWaUiZq0sNavXTKBjQKXavZSUmMzLjqlNoepfi1JBJ4S0y4v3HEP5Bjq7R8ODUBsEqi4rZgn3hVGeL3N7XM2yNEs18XjOFM_BlYcd_5rB3dTzaVGk6eLNASi5x0y03FUL5r2JPSRwD2JaIlzytLyzRbplEAgKKci4oBSmwufRGJL3KIdDoUS8uERneSvkefyreyvnh29zdBfgHk.Qppn504Rx37ut8CUh8ShpRWk.7QKkVhpf_MT18J2PovPBm08iBlzYkaw77f0CyWFuN.beTprELnNwm7FZ.gFzf4ec85qTkiYZAB1U0FZzfL9oJcLjgp7d5iwuyBAXuRkSpQB83e2JslccJR_W01UAo_QZXYJ.BFAvkHoHgO5S8Io9W7r2_tYxNZwz.MVHLOIzrlgKDtkwmX1y2i_v0b6tvplLxRnn_qV58YoVcLLGBSmuQl4VMmR9NKNyd2_unpMLRKG5hXa2wdRE8O7yFRBnyrX9m0F3k2TA5nZHyRtcJ5V7_rv41Bw2KJmqdzk4SZKUZBMml6JZsiL.vmcGOoTQ_AD7v0sMmyQpZswT5w1Ar8hHBZjgOM1R9dMgQdTbKhj22UxOnT5bh1uKEGPFlDYp.kVeKcQozULeztTW50XVmDSrNPzgr7OGT12XamnrdEKKn9HU7xZQ3dQiEFXRr9dXhD.BvZyBEuKeK77KZm4qFfQtwAJhzHJej_4Jp3SfnIiRGaeSug2sg2ivq6edBGDKOta7NWJ0n5s7zwXtqFmZM1TEzesweKSN0UcaL3v6uU7M_CHebMGGqx2fGLWcntWsQAgpLzuavYoYnJGRppW1X9XJ4FRU.o8zXiyWJcDkFxMff9d_s2lHorRHv1CvJsrE7YCZkTr5O5OcYz9CUuSgv8A7Bubt0S.dyzoqFhCK2P48c0F5op1__AnQhOkLFs6sO5sc5R0W87uQgCtFFaHrd3iKv_u6QfSqa7MniDwzMsVoThdEhUPiTZ24Bdro7PCSiYCHq2.p.DNJktsJNdEV33whVnPG4grSwCppEKIZ7u6exBwjxLR_KUE8NxC.NtrObtvETSaBTBP3jKcuggTZdRctwyoyHjM3pbpLxFO2tgV3K2jgTNfVYfD5mxewyR8SsObZE1GEIe2Kb08o3XqlfdzmHO4P_1sKzlaN3nSBKzSa6J7NvVQnVl8OtggtLw44q4fD9Ag4gTzRj0ipAbd4iJH3nSOhON9ck_8In8_FTJsee4TurW0Zh8F2pnBhnNk.GZuHSLil4kCPUbhGcgAzVEFHc03UGspzfsgxDoHLDfPfJuMOWOJ5Efb_PXfYLoA31niPULCeoSHjJUXSw"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=917958892ac28368';window._cf_chl_opt.cOgUHash = location.hash === '' && location.href.indexOf('#') !== -1 ? '#' : location.hash;window._cf_chl_opt.cOgUQuery = location.search === '' && location.href.slice(0, location.href.length - window._cf_chl_opt.cOgUHash.length).indexOf('?') !== -1 ? '?' : location.search;if (window.history && window.history.replaceState) {var ogU = location.pathname + window._cf_chl_opt.cOgUQuery + window._cf_chl_opt.cOgUHash;history.replaceState(null, null, "\/abstracts\/search?q=Geogebra&__cf_chl_rt_tk=MVQg2KqI_eLtOfNAz5ueGzlBeU38bnzr.D9aitrtGk4-1740503814-1.0.1.1-b0plAINzESTBNJMezRt5_YXZgD7WWsw4by63SVDV_hc" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>