A and C are the opposite vertices of a square ABCD, and have
coordinates (a,b) and (c,d), respectively. What are the coordinates
of the vertices B and D? What is the area of the square?
Find the vertices of a pentagon given the midpoints of its sides.
Is there a relationship between the coordinates of the endpoints of a line and the number of grid squares it crosses?
A cube (1 metre by 1 metre by 1 metre) has one face on the ground and
one face pressed up to a wall. A ladder, 4 metre long, is leaning
against the wall and it just touches the cube. How high is the top of
the ladder above the ground?