<div class="cp_arrows">
  <div><i class="cp_arrow_left"></i>Arrow:left</div>
  <div><i class="cp_arrow_right"></i>Arrow:right</div>
  <div><i class="cp_arrow_up"></i>Arrow:up</div>
  <div><i class="cp_arrow_down"></i>Arrow:down</div>
  <div><i class="cp_arrow_left_up"></i>Arrow:leftup</div>
  <div><i class="cp_arrow_left_down"></i>Arrow:leftdown</div>
  <div><i class="cp_arrow_right_up"></i>Arrow:rightup</div>
  <div><i class="cp_arrow_right_down"></i>Arrow:rightdown</div>
</div>

.cp_arrows [class*='cp_arrow'] {
  position: relative;
  vertical-align: middle;
  display: inline-block;
}
.cp_arrows [class*='cp_arrow']::before,
.cp_arrows [class*='cp_arrow']::after {
  content: '';
}
.cp_arrows [class*='cp_arrow'] {/*ベースの丸*/
  margin: 0px 0px 10px;
  width: 25px;
  height: 25px;
  border-radius: 3px;
  background: #009688;
}
.cp_arrows [class*='cp_arrow']::after {/*三角形の設定*/
  position: absolute;
  top: 5px;
  right: 5px;
  border-width: 0 10px 10px 0;
  border-style: solid;
  border-color: transparent #fff transparent transparent;
}
/*それぞれの角度*/
.cp_arrows .cp_arrow_left::after {
  top: 8px;
  transform: rotate(-135deg);
}
.cp_arrows .cp_arrow_right::after {
  top: 8px;
  right: 10px;
  transform: rotate(45deg);
}
.cp_arrows .cp_arrow_up::after {
  top: 10px;
  right: 7px;
  transform: rotate(-45deg);
}
.cp_arrows .cp_arrow_down::after {
  top: 5px;
  right: 7px;
  transform: rotate(135deg);
}
.cp_arrows .cp_arrow_left_up::after {
  top: 8px;
  right: 6px;
  transform: rotate(-90deg);
}
.cp_arrows .cp_arrow_left_down::after {
  top: 8px;
  right: 6px;
  transform: rotate(180deg);
}
.cp_arrows .cp_arrow_right_up::after {
  top: 8px;
  right: 8px;
  transform: rotate(0deg);
}
.cp_arrows .cp_arrow_right_down::after {
  top: 6px;
  right: 8px;
  transform: rotate(90deg);
}