Using the formula for the distance between two points, it is found that the length of the side joining the vertex in quadrant i to the vertex in quadrant ii is given by:
c) 10
<h3>What is the distance between two points?</h3>
Suppose that we have two points,
and
. The distance between them is given by:

In quadrant I, both coordinates are positive, hence the vertex is (4,6). In quadrant II, x is negative while y is positive, hence the vertex is (-6,6). Thus, the distance is given by:

Which means that option C is correct.
More can be learned about the distance between two points at brainly.com/question/18345417