SOURCE

<div class="circle">
    <div class="direction top"></div>
    <div class="direction right"></div>
    <div class="direction bottom"></div>
    <div class="direction left"></div>
    <div class="center"></div>
</div>

.circle{
    position: relative;
    width: 150px;
    height: 150px;
    background: white;
    border-radius: 50%;
    border: 1px solid gainsboro;
}
.circle .direction:hover{
    opacity: .6;
    cursor: pointer;
    background-color: gainsboro;
}
.circle .direction::after{
    content: "";
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%) rotate(-45deg);
    width: 0;
    height: 0;
    border-style: solid;
    border-color: transparent;
    border-bottom-color: #07c160;
    border-top-width: 10px;
    border-left-width: 10px;
    border-right-width: 10px;
    border-bottom-width: 10px;
}
.circle .center{
    width: 30px;
    height: 30px;
    border-radius: 50%;
    position: absolute;
    top: 50%;
    left: 50%;
    background: #07c160;
    transform: translate(-50%, -50%);
}

.circle .top{
    position: absolute;
    top: 0;
    left: 0;
    width: 75px;
    height: 75px;
    transform-origin: right bottom 0;
    transform: rotateZ(45deg);
    border-radius: 100% 0 0 0;
    bottom: 0;
}

.circle .right{
    position: absolute;
    top: 0;
    left: 0;
    width: 75px;
    height: 75px;
    transform-origin: right bottom 0;
    transform: rotateZ(135deg);
    border-radius: 100% 0 0 0;
    bottom: 0;
}

.circle .bottom{
    position: absolute;
    top: 0;
    left: 0;
    width: 75px;
    height: 75px;
    transform-origin: right bottom 0;
    transform: rotateZ(225deg);
    border-radius: 100% 0 0 0;
    bottom: 0;
}
.circle .left{
    position: absolute;
    top: 0;
    left: 0;
    width: 75px;
    height: 75px;
    transform-origin: right bottom 0;
    transform: rotateZ(-45deg);
    border-radius: 100% 0 0 0;
    bottom: 0;
}