Center: (-5,7)
Opens Vertically: (-5,-6)
The other vertex : (-5, 20)
The terms vertical and horizontal often refer to directions. Vertical lines run up and down, and horizontal lines run sideways. The letter 'v' pointing down tells you which direction is vertical.
Anything parallel to the horizon is called horizontal. Vertical is the opposite of horizontal, so anything that forms a 90-degree angle (right angle) with the horizontal or horizontal line is said to be vertical. Therefore, horizontal lines are lines from left to right. Place a horizontal one next to it, like a person is lying down, as opposed to a vertical one. When sleeping (unless it's a horse) the body is horizontal. Horizontal ones are parallel to the ground or pointing in the same direction as the horizon. Stacking books sideways will make them sideways.
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