If the circle is that bigger, its center can be centered within the. Do you also use the verb encircle here? Of course, the simple phrase circles are round that you mentioned.
Circle K Wikipedia
When talking about children's textbooks, they are sometimes asked to circle the correct answer. 知乎，中文互联网高质量的问答社区和创作者聚集的原创内容平台，于 2011 年 1 月正式上线，以「让人们更好的分享知识、经验和见解，找到自己的解答」为品牌使命。知乎凭借认真、专业. You can say coins are a circle in shape, the shape of coins is a circle, coins are circular (in shape).
