Answer:
<em>A cross section is the intersection of a </em><em><u>solid</u></em><em> and a </em><em><u>plane.</u></em>
Step-by-step explanation:
<em>A cross section</em> is the geometric place formed when an 3-D object (<em>solid</em>) is cut straight.
Imagine the shape that you can see when you cut a piece of cheese with a knife. If the piece of cheese is a cube, the resultant shape, the cross section, will be a square.
Also, you can imagine the shape formed when you cut a right cylinder (the solid) with a plane parallel to the base. In this case, the cross section will be a circle.
Depending on the form of the solid and the angle of the plane, different cross sections may be obtained.