Build shapes with CSS only

circle.css

.circle {
  width: 200px;
  height: 200px;
  background: #00a1de;
  border-radius: 50%
}

cone.css

.cone {
  border-left: 140px solid transparent;
  border-right: 140px solid transparent;
  border-top: 200px solid #00a1de;
  border-radius: 50%;
  height: 0;
  width: 0;
}

egg.css

 .egg {
  display: block;
  width: 252px;
  height: 360px;
  background-color: #00a1de;
  border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%;
}

heart.css

.heart {
  position: relative;
  width: 200px;
  height: 180px;
}
.heart:before,
.heart:after {
  position: absolute;
  content: "";
  left: 100px;
  top: 0;
  width: 100px;
  height: 160px;
  background: #00a1de;
  border-radius: 100px 100px 0 0;
  transform: rotate(-45deg);
  transform-origin: 0 100%;
}
.heart:after {
  left: 0;
  transform: rotate(45deg);
  transform-origin: 100% 100%;
}

oval.css

.oval {
  width: 300px;
  height: 150px;
  background: #00a1de;
  border-radius: 150px / 75px;
}

pac-man.css

.pacman {
  width: 0px;
  height: 0px;
  border-right: 120px solid transparent;
  border-top: 120px solid #00a1de;
  border-left: 120px solid #00a1de;
  border-bottom: 120px solid #00a1de;
  border-top-left-radius: 120px;
  border-top-right-radius: 120px;
  border-bottom-left-radius: 120px;
  border-bottom-right-radius: 120px;
}

rectangle.css

.rectangle {
  width: 300px;
  height: 150px;
  background: #00a1de;
}

six-points-star.css

 .six-points-star {
  width: 0;
  height: 0;
  border-left: 100px solid transparent;
  border-right: 100px solid transparent;
  border-bottom: 200px solid #00a1de;
  position: relative;
}
.six-points-star:after {
  width: 0;
  height: 0;
  border-left: 100px solid transparent;
  border-right: 100px solid transparent;
  border-top: 200px solid #00a1de;
  position: absolute;
  content: "";
  top: 60px;
  left: -100px;
}

square.css

.square {
  width: 200px;
  height: 200px;
  background: #00a1de;
}

trapezoid.css

 .trapezoid {
  border-bottom: 150px solid #00a1de;
  border-left: 50px solid transparent;
  border-right: 50px solid transparent;
  height: 0;
  width: 200px;
}

triangle-up.css

.triangle-up {
  width: 0;
  height: 0;
  border-left: 100px solid transparent;
  border-right: 100px solid transparent;
  border-bottom: 200px solid #00a1de;
}