How to create a horizontal line of three circles - html

Question

What I'm trying to create
Using HTML5 and CSS3 only, a horizontal row of three circles, each sitting on top of a different image, containing another image and one word of text.
What I have tried
I have tried to create this by just adding divs within divs and specifying heights and widths, but this has not worked. I sense I'm over-complicating something quite simple, or forgetting something very obvious. What is the simplest way of doing this?
A note
Go easy on me! I've been trying to self-learn for only 2 months.
The HTML
<div class="circlewrapper">
<div class="sector" id="read">
<img src="images/test1.jpg" class="image1" height="165" width="165" />
<div class="round" id="reading">
<img src="images/book.jpg" class="image2" height="20" width="20" />
<p id="readread">Read</p>
</div>
</div>
<div class="sector" id="listen">
<img src="images/test2.jpg" class="image1" height="165" width="165" />
<div class="round" id="listening">
<img src="images/book.jpg" class="image2" height="20" width="20" />
<p id="listlist">Listen</p>
</div>
</div>
<div class="sector" id="watch">
<img src="images/test3.jpg" class="image1" height="165" width="165" />
<div class="round" id="watching">
<img src="images/book.jpg" class="image2" height="20" width="20" />
<p id="watchwatch">Watch</p>
</div>
</div>
</div>
The CSS
.circlewrapper {
width: 800px;
height: 270px;
padding: 0px;
margin: 0px auto 0px auto;}
.sector {
width: 250px;
height: 250px;
padding: 0px;
margin: 8px;
display: inline;}
.round {
height: 165px;
width: 165px;
padding: 0px;
margin: 0px auto 0px auto;
background-color: blue;
border-radius: 165px;
-moz-border-radius: 165px;
-webkit-border-radius: 165px;
z-index: 10;}
p {
text-align: center;
color: white;}
.image1 {
margin: 0px auto 0px auto;
padding: 0px;
z-index: 5;}
.image2 {
margin: 0px auto 0px auto;
padding: 0px;}

Answer 1

Add to .sector float: left;. It worked for me.