1.0Yosep Dwi Kristanto — Universitas Sanata Dharmahttps://people.usd.ac.id/~ydkristantoydkristantohttps://people.usd.ac.id/~ydkristanto/index.php/author/ydkristanto/rich600338<blockquote class="wp-embedded-content"><a href="https://people.usd.ac.id/~ydkristanto/index.php/media-pengajaran/pemecahan-masalah-kotak-terbuka/">Pemecahan Masalah: Persoalan Kotak Terbuka</a></blockquote> <script type='text/javascript'> <!--//--><![CDATA[//><!-- /*! This file is auto-generated */ !function(c,d){"use strict";var e=!1,n=!1;if(d.querySelector)if(c.addEventListener)e=!0;if(c.wp=c.wp||{},!c.wp.receiveEmbedMessage)if(c.wp.receiveEmbedMessage=function(e){var t=e.data;if(t)if(t.secret||t.message||t.value)if(!/[^a-zA-Z0-9]/.test(t.secret)){for(var r,a,i,s=d.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),n=d.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),o=0;o<n.length;o++)n[o].style.display="none";for(o=0;o<s.length;o++)if(r=s[o],e.source===r.contentWindow){if(r.removeAttribute("style"),"height"===t.message){if(1e3<(i=parseInt(t.value,10)))i=1e3;else if(~~i<200)i=200;r.height=i}if("link"===t.message)if(a=d.createElement("a"),i=d.createElement("a"),a.href=r.getAttribute("src"),i.href=t.value,i.host===a.host)if(d.activeElement===r)c.top.location.href=t.value}}},e)c.addEventListener("message",c.wp.receiveEmbedMessage,!1),d.addEventListener("DOMContentLoaded",t,!1),c.addEventListener("load",t,!1);function t(){if(!n){n=!0;for(var e,t,r=-1!==navigator.appVersion.indexOf("MSIE 10"),a=!!navigator.userAgent.match(/Trident.*rv:11\./),i=d.querySelectorAll("iframe.wp-embedded-content"),s=0;s<i.length;s++){if(!(e=i[s]).getAttribute("data-secret"))t=Math.random().toString(36).substr(2,10),e.src+="#?secret="+t,e.setAttribute("data-secret",t);if(r||a)(t=e.cloneNode(!0)).removeAttribute("security"),e.parentNode.replaceChild(t,e)}}}}(window,document); //--><!]]> </script><iframe sandbox="allow-scripts" security="restricted" src="https://people.usd.ac.id/~ydkristanto/index.php/media-pengajaran/pemecahan-masalah-kotak-terbuka/embed/" width="600" height="338" title="“Pemecahan Masalah: Persoalan Kotak Terbuka” — Yosep Dwi Kristanto — Universitas Sanata Dharma" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe>https://people.usd.ac.id/~ydkristanto/wp-content/uploads/2025/09/sampul-kotak-terbuka-01.png1200600Sumber belajar interaktif yang mengilustrasikan bagaimana pemotongan persegi yang kongruen dari tiap pojok kertas persegi panjang akan menghasilkan kotak terbuka, serta menunjukkan hubungan antara panjang sisi persegi dan volume kotak tersebut melalui grafik.