How to make this shape use only css
What I have tried:
.button-up {
border-top: 100px solid red;
border-left: 50px solid transparent;
border-right: 50px solid transparent;
border-top-left-radius: 50%;
border-top-right-radius: 50%;
border-bottom: 35px solid transparent;
width: 200px;
}
<div class="button-up"></div>
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