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Colinear points mean that if you draw a (really long) line between any two of them, the line will pass through the others.
Or simply: there can exist a straight line that can pass through all of them.
These are colinear points:
. .... ..
One line can pass through all of them:
These ar not colinear points:
:.
If I try to connect any two of them with a line, the third point will not lie on that line.
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What do parallel lines mean?
It means the lines will never meet, even if they went on infinitely long. The lines move in exactly the same direction, even if their length is different. Another way to think about it, is that you could lay one line over the other, and you would only see one line (because they line up exactly).To help visualize this, lay to pencils side by side so that the eraser is flush with something (a piece of paper, table end, etc.). These pencils are said to be parallel.With a square, the "top" and "bottom" lines are parallel to each other. The "left" and "right" lines are parallel to each other. But, for example, the "top" and "left" lines are perpendicular to each other, which just means they form a 90 degree angle.The symbol used to denote parallel is: ∥ (two parallel lines actually)So A ∥ B just means A is parallel to B.
What is points that lay on the same plane called?
coplanar
Give some real examples of intersecting lines?
If you are talking about lay lines there are several in Scotland and Great Britian, a Scotish Castle in Edinbrugh that continues to Stonehenge. There is an intersection of these lines in New Mexico and in Central and South America. These intersection of lay lines is said to have electromagnetic forces and can be a place of healing the physical body.
How do you construct parallel lines using set square and ruler?
Draw a construction line (to be deleted) perpendicular to the lines you wish to draw. Lay one edge of the set-square (not the hypotenuse) along this line and draw one line using the other non-hypotenuse edge. Repeat this further up the construction line. Delete the construction line.
Do perpendicular lines lay on the same plane?
No. Stand in a cuboid room and consider the line joining the floor and the opposite wall. Line 1: the line joining the floor to the wall on your left. Line 2: the line the far wall to the wall to your right. Both these lines are perpendicular to the first, but they are not in the same plane.
