Github地址:https://github.com/Jasonccj/css-learning/tree/master/everydayCss/polygon
掘金地址:https://juejin.im/post/5c68375d5188252a160efdec
慕课地址:http://www.xianlaiwan.cn/article/278712

正方形

.square {
    width: 100px;
    height: 100px;
    background-color: green;
}

长方形

.rectangle {
    width: 200px;
    height: 100px;
    background-color: green;
}

锐角三角形

.triangle-acute {
    width: 0;
    height: 0;
    border-left: 50px solid transparent;
    border-right: 50px solid transparent;
    border-bottom: 100px solid green; 
}

直角三角形

.triangle-right {
    width: 0;
    height: 0;
    border-left: 50px solid green;
    border-right: 50px solid transparent;
    border-top: 50px solid transparent;
    border-bottom: 50px solid green; 
}

平行四边形

.rhomboid {
    width: 200px;
    height: 100px;
    margin-left: 30px;
    background-color: green;
    transform: skewX(30deg)
}

梯形

.trapezoid {
    width: 100px;
    height: 0;
    border-bottom: 100px solid green;
    border-left: 50px solid transparent;
    border-right: 50px solid transparent;
}

圆形

.circle {
    width: 100px;
    height: 100px;
    background-color: green;
    border-radius: 50%;
}

其他图形后续不断更新中!

最后

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