CodePen Embed - CSS Triangle

<div class="container">
  <div class="triangle-1"></div>   
</div>

<div class="container">
  <div class="triangle-2"></div> 
</div>

.triangle-1 {
  width: 0;
  border-left: 130px solid transparent;
  border-bottom: 130px solid #f9cb30;
}

.triangle-2 {
  width: 0;
  height: 0;
  border-left: 130px solid transparent;
  border-right: 130px solid transparent;
  border-bottom: 130px solid #f9cb30;
}

.container {
  display: flex;
  justify-content: center;
  width: 90%;
  margin: 30px auto;
}

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