The point of intersection.
Vertically opposite.
Rhombus
Two planes that intersect are simply called a plane to plane intersection. When they intersect, the intersection point is simply called a line.
A parallelogram with right angles is a rectangle.---------------------------------To construct a right angle using a straight edge and a pair of compasses:Draw the first lineExtend the first line beyond the point where the right angle is required (call this point O).With the point of the compasses on the point where the right angle is to be constructed draw a small arc on the straight line either side of point O; call the points where these arcs cross the straight line as A and B.Open the compasses to a larger widthWith the point of the compasses on one of points A and b (say A) draw one arc above the line roughly in the middle between points A and B (above point O).With the point of the compasses on the point of A and B (say B) draw an arc to intersect the last arc just drawn (above point O); call this point CUsing the straight edge, join point O to point C, forming a right angle.rub out the extended bit of the line beyond point O that was used to construct the right angle.
Perpendicular
Two lines that intersect and form 90-degree angles (right angles) are "perpendicular" to each other. You would call them "perpendicular lines."
They are perpendicular lines that intersect at right angles or 90 degrees
Perpendicular lines.
perpendicular.
intersecting lines
When two lines cross each other they form vertical equal opposite angles
parallel lines
When two unique lines intersect, two pairs of equal angles will be formed. All four angles could be 90 degrees (right angles) if the lines are perpendicular. If the lines are oblique, the pairs of angles can vary (almost) infinitely within a given range (1 degree-179 degrees).The intersection of two lines results in two pairs of equal angles such that the sum of angles equals 360. Another way to state this is that two adjacent angles will always sum to 180 degrees. That said, the best we can do is to express one angle in terms of the other. Call a pair of adjacent angles a and b. In the case of two adjacent angles, a = 180 - b, or b = 180 - a.
parallel
parallel lines
Skew lines.