Reflection Over the Y-axis

The video tutorial explains how to reflect triangle ABC over the Y-axis. It begins by introducing the concept of reflection and the orientation of the axes. The tutorial then provides step-by-step instructions for reflecting each vertex of the triangle: A, B, and C. For each point, the process involves keeping the Y-coordinate the same and changing the X-coordinate to its opposite value. The tutorial concludes by joining the new points to form the reflected triangle.

What is the orientation of the Y-axis?

• Diagonally

• Vertically

• Circularly

• Horizontally

Which axis is used as the line of reflection in this tutorial?

• Diagonal axis

• Z-axis

• Y-axis

• X-axis

What is the first step in reflecting a triangle over the Y-axis?

• Calculate the area

• Identify the coordinates

• Draw the triangle

• Remember the axis orientation

When reflecting a point over the Y-axis, which coordinate remains unchanged?

• Neither coordinate

• Y-coordinate

• Both coordinates

• X-coordinate

If point A is at (-3, 5), what will be its coordinates after reflection over the Y-axis?

• (-3, 5)

• (3, -5)

• (-3, -5)

• (3, 5)

What happens to the distance of a point from the Y-axis after reflection?

• It becomes zero

• It remains the same

• It halves

• It doubles

If a point is on the left of the Y-axis, where will it be after reflection?

• On the right

• On the left

• At the origin

• Above the X-axis

What is the significance of the Y-coordinate during reflection over the Y-axis?

• It becomes zero

• It changes to the opposite

• It remains constant

• It doubles

What is the new X-coordinate of point B if its original coordinates are (1, -3)?

• -1

• -3

• 1

• 3

After reflecting point B over the Y-axis, what happens to its Y-coordinate?

• It doubles

• It becomes positive

• It becomes negative

• It remains the same