Reflection of Quadrilateral ABCD

The video tutorial demonstrates how to reflect a quadrilateral ABCD across the x-axis using a step-by-step approach. Each vertex of the quadrilateral is reflected individually, maintaining the x-coordinate while changing the y-coordinate to its opposite. The tutorial highlights the symmetry and properties of reflections, showing how the top and bottom parts of the quadrilateral switch positions relative to the x-axis. The process is illustrated using a tool on Khan Academy, providing a clear visual understanding of geometric reflections.

What is the main task described in the video?

• Plotting a new quadrilateral

• Constructing a triangle

• Finding the area of a quadrilateral

• Reflecting quadrilateral ABCD across the x-axis

How many units above the x-axis is point A located?

• 3 units

• 4 units

• 2 units

• 5 units

What happens to the y-coordinate of point A after reflection?

• It becomes positive

• It remains the same

• It doubles

• It becomes negative

What is the y-coordinate of point B after reflection?

• -2

• 2

• -4

• 0

What is the x-coordinate of point C before reflection?

• -5

• 5

• 4

• -4

After reflection, what is the y-coordinate of point C?

• -5

• 0

• 4

• -4

What is the y-coordinate of point D after reflection?

• 2

• 0

• 1

• -1

What remains unchanged for all points during reflection across the x-axis?

• Y-coordinate

• X-coordinate

• Both coordinates

• Neither coordinate

What is the significance of the reflection process in this example?

• It changes the shape of the quadrilateral

• It demonstrates symmetry across the x-axis

• It alters the size of the quadrilateral

• It shifts the quadrilateral to a new position

What is the final position of the original quadrilateral in relation to the x-axis?

• To the right of the x-axis

• On the x-axis

• Below the x-axis

• Above the x-axis