The horizontal cross section shown is a parallel to the base of the pyramid is the shortest side of the cross-section measures 1.2 cm what is the measure of the cross

The longest side of the cross-section is:

Step-by-step explanation:

Given

See attachment for pyramid

Required

The longest side of the cross-section

The base of the pyramid is a rectangle with the following dimension (in terms of length)

For the cross-section, we have:

Since both are parallel, then the following relationship exist between both

So, we have:

Express as fraction

Make x the subject

if you was gonna solve for a, a is a   < -12