Select all the shapes that are quadrilaterals. pentagon triangle square rhombus

## Step 1<br />A quadrilateral is a polygon with four sides. This means that any shape with four sides is a quadrilateral.<br />## Step 2<br />Looking at the options, we can see that the square and rhombus both have four sides. Therefore, they are quadrilaterals.<br />## Step 3<br />On the other hand, a pentagon has five sides and a triangle has three sides. Therefore, they are not quadrilaterals.