Question

A quadrilateral has vertices
P(3,5),Q(-4,3),R(-3,-2),and S(5,-4).
Find the lengths of the diagonals,to the nearest tenth?

Answer 1

Maybe re-wording this question will help you out. Find the distance between two points:
a)(-4,3) and (5,-4)
b)(-3,-2) and (3,5)

I'm sure your teacher gave you this formula:

d = sqroot [(x2 - x1)^2 + (y2 - y1)^2]

where x and y are defined as (x,y) in the coordinate. x2 just mean the x in the second coordinate.