Question

practice 6 (from unit 5, lesson 2)
select all figures for which at least one cross - section is a circle.
a triangular pyramid
b square pyramid
c rectangular prism
d cube
e cone
f cylinder
g sphere

Explanation:

• A triangular pyramid: Cross - sections are triangles or quadrilaterals, no circles.
• B square pyramid: Cross - sections are triangles or quadrilaterals, no circles.
• C rectangular prism: Cross - sections are rectangles, squares, etc., no circles.
• D cube: Cross - sections are squares, rectangles, etc., no circles.
• E cone: A cross - section parallel to the base is a circle.
• F cylinder: A cross - section parallel to the bases is a circle.
• G sphere: Any cross - section is a circle.

Answer:

E. cone, F. cylinder, G. sphere