Practice - Buổi 4

The stage is the space where sprites can move around. This space is two-dimensional. The horizontal direction goes from -240 to 240. The vertical direction ranges from?

• -180 to 180

• -360 to 360

• -90 to 90

• -240 to 240

• None of the above

Ordered pair (0,0) is also known as the ___.

• y-axis

• x-axis

• Origin

• None of the above

What is the co-ordinate of the center of the screen?

• (x:0,y:180)

• (x:0,y:0)

• (x:240,y:180)

• (x:240,y:0)

What is the vocabulary word for the vertical line on the left of the coordinate plane?

• y-axis

• x-axis

• Origin

• Coordinate Plane

In the ordered pair (4,9), which number is the y-coordinate?

• 4

• 9

• Neither

• both

What would this command do?

• Set X by ….

• Transform X by ….

• Change Y by ….

• Go to X by ….

• None of the above

Where is this location on screen?

• To the left

• In the middle

• At the top

• At the bottom

What would this command do?

• Sprite would glide and go to position x..., y...

• Sprite would go to random position x..., y...

• Sprite would fly…secs and go to random position.

• Sprite would slide…secs and go to position x.., y...

• E. None of the above.

The X-axis is ___________?

• "Left" and "Right"

• "Up" and "Down"

• "Left" and "Down"

• "Right" and "Up"

This is an image of the stage in scratch, which coordinates would be a location in the bottom right?

• x = -120, y = 145

• x = 200, y = -100

• x = 120, y = 145

• x = -134, y = -120