igeom/src/css/icons.css

.icon {
  background: center no-repeat;
}

.icon-line {
  background-image: url("../assets/images/icons/Line.png");
}

.icon-circumference {
  background-image: url("../assets/images/icons/Circunference.png");
}

.icon-point {
  background-image: url("..//assets/images/icons/Point.png");
}