code:
#triangle {
width: 0;
height: 0;
border-left: 70px solid transparent;
border-right: 70px solid transparent;
border-bottom: 140px solid blue;
margin: 0 auto;
}
result:
code:
#star-five:before {
border-bottom: 80px solid red;
border-left: 30px solid transparent;
border-right: 30px solid transparent;
position: absolute;
height: 0;
width: 0;
top: -45px;
left: -65px;
display: block;
content: "";
transform: rotate(-35deg);
}
#star-five:after {
position: absolute;
display: block;
color: blue;
top: 3px;
left: -105px;
width: 0px;
height: 0px;
border-right: 100px solid transparent;
border-bottom: 70px solid red;
border-left: 100px solid transparent;
transform: rotate(-70deg);
content: "";
}
result:
code:
#octagon {
width: 100px;
height: 100px;
background: red;
position: relative;
}
#octagon:before {
content: "";
width: 100px;
height: 0;
position: absolute;
top: 0;
left: 0;
border-bottom: 29px solid red;
border-left: 29px solid #eee;
border-right: 29px solid #eee;
}
#octagon:after {
content: "";
width: 100px;
height: 0;
position: absolute;
bottom: 0;
left: 0;
border-top: 29px solid red;
border-left: 29px solid #eee;
border-right: 29px solid #eee;
}
result:
code:
#heart {
position: relative;
width: 111px;
height: 100px;
margin: 0 auto;
}
#heart:before,
#heart:after {
position: absolute;
content: "";
left: 50px;
width: 50px;
height: 80px;
background: red;
border-radius: 50px 50px 0 0;
transform: rotate(-45deg);
transform-origin: 0 100%;
}
#heart:after {
left: 0;
transform: rotate(45deg);
transform-origin: 100% 100%;
}
result:
code:
#heart {
position: relative;
width: 111px;
height: 100px;
margin: 0 auto;
}
#heart:before,
#heart:after {
position: absolute;
content: "";
left: 50px;
width: 50px;
height: 80px;
background: red;
border-radius: 50px 50px 0 0;
transform: rotate(-45deg);
transform-origin: 0 100%;
}
#heart:after {
left: 0;
transform: rotate(45deg);
transform-origin: 100% 100%;
}
result: