The starting point is at . When we move up or down we are moving along the -axis. When we move to the right or left we are moving along the -axis. 

Moving up the -axis and moving right on the -axis means addition. 

Moving down the -axis and moving left on the axis means subtraction. 

Because we are moving down , we can subtract  from our  coordinate point and because we are moving to the right  we can add  to our coordinate point. 

The starting point is at . When we move up or down we are moving along the -axis. When we move to the right or left we are moving along the -axis. 

Moving up the -axis and moving right on the -axis means addition. 

Moving down the -axis and moving left on the axis means subtraction. 

Because we are moving up , we can add  to our  coordinate point and because we are moving to the right  we can add  to our coordinate point. 

The starting point is at . When we move up or down we are moving along the -axis. When we move to the right or left we are moving along the -axis. 

Moving up the -axis and moving right on the -axis means addition. 

Moving down the -axis and moving left on the axis means subtraction. 

Because we are moving up , we can add  to our  coordinate point and because we are moving to the right  we can add  to our coordinate point. 

The starting point is at . When we move up or down we are moving along the -axis. When we move to the right or left we are moving along the -axis. 

Moving up the -axis and moving right on the -axis means addition. 

Moving down the -axis and moving left on the axis means subtraction. 

Because we are moving up , we can add  to our  coordinate point and because we are moving to the right  we can add  to our coordinate point. 

The starting point is at . When we move up or down we are moving along the -axis. When we move to the right or left we are moving along the -axis. 

Moving up the -axis and moving right on the -axis means addition. 

Moving down the -axis and moving left on the axis means subtraction. 

Because we are moving up , we can add  from our  coordinate point and because we are moving to the right  we can add  to our coordinate point. 

A quadrilateral is any two-dimensional shape with   sides. The only shape listed that does not have  sides is a triangle. 

The only difference between a rectangle and a square is their side lengths. A square has to have  equal side lengths, but the opposite side lengths of a rectangle only have to be equal. 

A square can also be a rectangle and a rhombus because a rectangle has to have at least  sets of equal side lengths and a rhombus has to have  equal side lengths, like a square, and at least  sets of equal angles.

Out of the choices given, the only characteristic used to describe shapes is the number of sides. A triangle has  sides and a rectangle has  sides. 

By definition, the only two quadrilaterals that have to have  right angles, are the square and the rectangle.