New thumbnails, fixed school about page, new math lesson, and stuff

1 files changed, 21 insertions, 21 deletions

diff --git a/lessons/matematika/pangkat-akar/akar.html b/lessons/matematika/pangkat-akar/akar.html
index 35ed018..4665ae0 100644
--- a/lessons/matematika/pangkat-akar/akar.html
+++ b/lessons/matematika/pangkat-akar/akar.html
@@ -61,57 +61,57 @@
             <h1 id="definition">Definition</h1>
             Root is the inverse of exponent. For example;<br>
             <ul>
-                <li>4<sup>2</sup> = 16, <b>so <span class="root">16</span> = 4</b></li>
-                <li>5<sup>2</sup> = 25, <b>so <span class="root">25</span> = 5</b></li>
-                <li>10<sup>2</sup> = 100, <b>so <span class="root">100</span> = 10</b></li>
+                <li>4<sup>2</sup> = 16, <b>so <span class="sroot">16</span> = 4</b></li>
+                <li>5<sup>2</sup> = 25, <b>so <span class="sroot">25</span> = 5</b></li>
+                <li>10<sup>2</sup> = 100, <b>so <span class="sroot">100</span> = 10</b></li>
             </ul>
 
             <h1 id="simplification">Simplifying Square Roots</h1>
             You can simplify a root by factoring the root number another number that is rational. Or in other words, divide the root number by the perfect squares. For example;  
             <ul>
                 <li>
-                    <strong>Simplify <span class="root">60</span></strong><br>
-                    <span class="root">60</span> = <span class="root">4 &times; 15</span> = 2<span class="root">15</span><br>
+                    <strong>Simplify <span class="sroot">60</span></strong><br>
+                    <span class="sroot">60</span> = <span class="sroot">4 &times; 15</span> = 2<span class="sroot">15</span><br>
                 </li>
                 <li>
-                    <strong>Simplify <span class="root">48</span></strong><br>
-                    <span class="root">48</span> = <span class="root">16 &times; 3</span> = 4<span class="root">3</span><br>
+                    <strong>Simplify <span class="sroot">48</span></strong><br>
+                    <span class="sroot">48</span> = <span class="sroot">16 &times; 3</span> = 4<span class="sroot">3</span><br>
                 </li>
                 <li>
-                    <strong>Simplify <span class="root">125</span></strong><br>
-                    <span class="root">125</span> = <span class="root">25 &times; 5</span> = 5<span class="root">5</span><br>
+                    <strong>Simplify <span class="sroot">125</span></strong><br>
+                    <span class="sroot">125</span> = <span class="sroot">25 &times; 5</span> = 5<span class="sroot">5</span><br>
                 </li>
             </ul>
 
             <h1 id="root-operations">Root Operations</h1>
             <h2 id="root-operations--addition">Addition</h2>
             Roots with coefficient can be added with another coefficient that have the same roots. <br>
-            <strong>a<span class="root">c</span> + b<span class="root">c</span> = (a + b)<span class="root">c</span></strong>
+            <strong>a<span class="sroot">c</span> + b<span class="sroot">c</span> = (a + b)<span class="sroot">c</span></strong>
             <ul>
-                <li>3<span class="root">2</span> + 4<span class="root">2</span> = (3 + 4)<span class="root">2</span> = <strong>7<span class="root">2</span></strong></li>
-                <li><span class="root">5</span> + 3<span class="root">5</span> = (1 + 3)<span class="root">5</span> = <strong>4<span class="root">5</span></strong></li>
+                <li>3<span class="sroot">2</span> + 4<span class="sroot">2</span> = (3 + 4)<span class="sroot">2</span> = <strong>7<span class="sroot">2</span></strong></li>
+                <li><span class="sroot">5</span> + 3<span class="sroot">5</span> = (1 + 3)<span class="sroot">5</span> = <strong>4<span class="sroot">5</span></strong></li>
             </ul>
             <h2 id="root-operations--subtraction">Subtraction</h2>
             Roots with coefficient can be subtracted with another coefficient that have the same roots. <br>
-            <strong>a<span class="root">c</span> - b<span class="root">c</span> = (a - b)<span class="root">c</span></strong>
+            <strong>a<span class="sroot">c</span> - b<span class="sroot">c</span> = (a - b)<span class="sroot">c</span></strong>
             <ul>
-                <li>7<span class="root">3</span> - 4<span class="root">3</span> = (7 - 4)<span class="root">3</span> = <strong>3<span class="root">2</span></strong></li>
-                <li>10<span class="root">6</span> - 5<span class="root">6</span> = (10 - 5)<span class="root">6</span> = <strong>5<span class="root">6</span></strong></li>
+                <li>7<span class="sroot">3</span> - 4<span class="sroot">3</span> = (7 - 4)<span class="sroot">3</span> = <strong>3<span class="sroot">2</span></strong></li>
+                <li>10<span class="sroot">6</span> - 5<span class="sroot">6</span> = (10 - 5)<span class="sroot">6</span> = <strong>5<span class="sroot">6</span></strong></li>
             </ul>
             <h2 id="root-operations--multiplication">Multiplication</h2>
             Roots can be multiplied with any other roots. If the root is the same as the other multiplied root, the root can be deleted (if you want to be faster). <br>
-            <strong>a<span class="root">c</span> &times; b<span class="root">d</span> = (a &times; b)<span class="root">c &times; d</span></strong>
+            <strong>a<span class="sroot">c</span> &times; b<span class="sroot">d</span> = (a &times; b)<span class="sroot">c &times; d</span></strong>
             <ul>
-                <li><span class="root">2</span> &times; <span class="root">5</span> = <strong><span class="root">10</span></strong></li>
-                <li>3<span class="root">2</span> &times; 4<span class="root">3</span> = (3 &times; 4)<span class="root">2 &times; 3</span> = <strong>12<span class="root">6</span></strong></li>
-                <li>2<span class="root">5</span> &times; 3<span class="root">5</span> = (2 &times; 3)(5) = 6(5) = <strong>30</strong></li>
+                <li><span class="sroot">2</span> &times; <span class="sroot">5</span> = <strong><span class="sroot">10</span></strong></li>
+                <li>3<span class="sroot">2</span> &times; 4<span class="sroot">3</span> = (3 &times; 4)<span class="sroot">2 &times; 3</span> = <strong>12<span class="sroot">6</span></strong></li>
+                <li>2<span class="sroot">5</span> &times; 3<span class="sroot">5</span> = (2 &times; 3)(5) = 6(5) = <strong>30</strong></li>
             </ul>
             <h2 id="root-operations--division">Division</h2>
             Roots can be divided with any other roots. <br>
-            <strong>a<span class="root">c</span> &divide; b<span class="root">d</span> = (a &divide; b)<span class="root">c &divide; d</span></strong>
+            <strong>a<span class="sroot">c</span> &divide; b<span class="sroot">d</span> = (a &divide; b)<span class="sroot">c &divide; d</span></strong>
             <ul>
                 <li>
-                    8<span class="root">6</span> &divide; 4<span class="root">3</span> = (8 &divide; 4)<span class="root">6 &divide; 3</span> = <strong>2<span class="root">2</span></strong>
+                    8<span class="sroot">6</span> &divide; 4<span class="sroot">3</span> = (8 &divide; 4)<span class="sroot">6 &divide; 3</span> = <strong>2<span class="sroot">2</span></strong>
                 </li>
             </ul>
         </section>