• Triangle Down         • Triangle Left              • Triangle Right
  • Triangle Top-Left     • Triangle Top-Right     • Triangle Bottom-Left
  • Triangle Bottom-Right

Various triangle shapes with CSS, created only with a sinlge DIV tag and a few CSS properties.

Triangle Up

Code:
<style type="text/css">
#triangleup {
 width: 0;
 height: 0;
 border-left: 50px solid transparent;
 border-right: 50px solid transparent;
 border-bottom: 100px solid blue;
}
</style>

<div id="triangleup"><br/><br/><br/>>UP</div>
Demo:



UP

Triangle Down

Code:
<style type="text/css">
#triangledown {
 width: 0;
 height: 0;
 border-left: 50px solid transparent;
 border-right: 50px solid transparent;
 border-top: 100px solid blue;
}
/* For the content in triangle */
#triangledown div{ margin:-85px 0 0 -20px; }
</style>

<div id="triangledown"><div>DOWN</div></div>
Demo:
DOWN

Triangle Left

Code:
<style type="text/css">
#triangleleft {
 width: 0;
 height: 0;
 border-top: 50px solid transparent;
 border-bottom: 50px solid transparent;
 border-right: 100px solid blue;
}
/* For the content in triangle */
#triangleleft div{ margin:-10px 0 0 25px; }
</style>

<div id="triangleleft"><div>LEFT</div></div>
Demo:
LEFT

Triangle Right

Code:
<style type="text/css">
#triangleright {
 width: 0;
 height: 0;
 border-top: 50px solid transparent;
 border-bottom: 50px solid transparent;
 border-left: 100px solid blue;
}
/* For the content in triangle */
#triangleright div{ margin:-10px 0 0 -85px; }
</style>

<div id="triangleright"><div>RIGHT</div></div>
Demo:
RIGHT

Triangle Top-Left

Code:
<style type="text/css">
#triangletopleft {
 width: 0;
 height: 0;
 border-top: 100px solid blue;
 border-right: 50px solid transparent;
}
</style>

<div id="triangletopleft">...</div>
Demo:
...

Triangle Top-Right

Code:
<style type="text/css">
#triangletopright {
 width: 0;
 height: 0;
 border-top: 100px solid blue;
 border-left: 50px solid transparent;
}
</style>

<div id="triangletopright">...</div>
Demo:
...

Triangle Bottom-Left

Code:
<style type="text/css">
#trianglebottomleft {
 width: 0;
 height: 0;
 border-bottom: 100px solid blue;
 border-right: 50px solid transparent;
}
</style>

<div id="trianglebottomleft">...</div>
Demo:
...

Triangle Bottom-Right

Code:
<style type="text/css">
#trianglebottomright {
 width: 0;
 height: 0;
 border-bottom: 100px solid blue;
 border-left: 50px solid transparent;
}
</style>

<div id="trianglebottomright">...</div>
Demo:
...

Daily Test with Code Example

HTML
CSS
JavaScript
PHP-MySQL
Which tag renders as emphasized text, displaying the text oblique?
<strong> <pre> <em>
<p>Web development courses: <em>CoursesWeb.net</em></p>
Which CSS property defines the space between the element border and its content?
margin padding position
h3 {
  padding: 2px 0.2em;
}
Click on the method which returns the first element that matches a specified group of selectors.
getElementsByName() querySelector() querySelectorAll()
// gets first Div with class="cls", and shows its content
var elm = document.querySelector("div.cls");
alert(elm.innerHTML);
Indicate the PHP variable that contains data from a form sent with method="post".
$_SESSION $_GET $_POST
if(isset($_POST["field"])) {
  echo $_POST["field"];
}
Triangles with CSS

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