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1. Parallel lines meet exactly once.
- Parallel lines do not intersect in the real plane.
2. Skew lines are coplanar.
- Skew lines are two or more lines that do not intersect, are not parallel, and are not coplanar. (Remember that parallel lines and intersecting lines lie on the same plane.)
3. A line is called transversal if and only if it intersects two parallel.
- First, if a transversal intersects two lines so that corresponding angles are congruent, then the lines are parallel.
- Second, if a transversal intersects two lines so that interior angles on the same side of the transversal are supplementary, then the lines are parallel.
4. Two lines are perpendicular if and only if they intersect to form right angles.
- Perpendicular lines conditional If two lines are perpendicular, then they intersect to form right angles.
- If two lines intersect to form right angles, then they are perpendicular. If a conditional and its converse are both true, we can write it as a Biconditional using if and only if.
5. The supplement of a right angle is a right angle.
- The supplement of a right angles is always Right angle.
6. A 96° angle is a right angle.
- Right angle-an 90 degree angle.
7. A point is a two-dimensional figure.
- A point has no dimensions.
8. Two distinct lines intersect at one point.
- If two distinct lines intersect, then they intersect in exactly one point. If there is a line and a point not in the line, then there is exactly one plane that contains them. If two distinct lines intersect, then they lie exactly in one plane.
9. Points are collinear if they are on the same plane.
- Two points are always collinear since we can draw a distinct (one) line through them. Three points are collinear if they lie on the same line. Points A, B, and C are not collinear.
10. Every segment has exactly one midpoint.
- A line segment is defined as a straight line without any bends which originates from one point and ends at other point. Midpoint of a line segment: A midpoint of a line segment is defined as the point which is the point which divides the line segment into two halves.
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