Place an image at the top of a DIV and center it

Question

I have 2 containers, one grey, one white. I\'d like to place an image (this will be a triangle down) to the very top of the white background and center it horizontally. How coul

Answer 1

    .container{
position:relative;
}
.triangle {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    top: -130px;
}