HTML CSS Relative units

p{
Background:grey;
Color:white;
font-size:0.5in;
Height:2em;

width:50%;
}

Height:2em means that the height shown on the screen is twice times the size of the font

font-size:0.5in: The font size of HTML is set to 0.5 inches, which is the absolute value

width:50% width of the browser 0.5

CSS relative lengths can also be used more flexibly, such as Width:calc (80%-20px);

Use of CSS angles

. image_test_1,. image_test_5 {
-moz-transform:rotate ( -5DEG);
-webkit-transform:rotate ( -5DEG);
-o-transform:rotate ( -5DEG);
Transform:rotate ( -5DEG);

/*

-o-transform:/* Opera Browser */

-webkit-transform:/* WebKit Kernel Browser */

-moz-transform:/* Firefox browser */

*/
}

HTML CSS Relative units