Chapter 6.1, Problem 12PSB

To determine

To state every four sided figure of quadrilateral folded along its diagonal is a plane figure.

Answer to Problem 12PSB

No, every four sided figure of quadrilateral folded along its diagonal is not a plane figure.

Explanation of Solution

Given information:

A quadrilateral folded along its diagonal.

  

In this example, we use concept of plane figures. Plane figures are flat two dimensional shape. It is evident from above figure that we need three dimension to visualize front view.

Thus not every side of quadrilateral is a plane figure.