If two circles intersect then they have to intersect at two points.
No, they can intersect at infinitely many points.
what of a triangle has three line segments that intersect only at their endpoints
Two collinear rays that do not intersect are called parallel rays. This will only occur for a short time, however, because they will intersect at some point.
No, perpendicular planes intercept at only one point. Parallel planes do not intersect at all.
Assuming that the none of the lines are parallel, they can intersect (pairwise) at three points. Otherwise, the question is tautological.
No, two straight lines can intersect at only one point and that is their point of intersection.
Circle A only: 9, 27, 45, 63, 81, 99, 117 Circle B only: No numbers Circle C only: 21, 42, 84, 105 Circles A and B intersect: 18, 36, 54, 72, 90, 108 Circles B and C intersect: No numbers. Circles A and C intersect: 63 Circles A, B and C intersect: 126
No, only three lines can intersect at a single point.
Point.
Two straight lines, whether they're in the same or different planes, must intersect at either one point or else at no points.
Not always. Only if the point is on the line. it
No, they can intersect at infinitely many points.
No, 2 planes may only intersect at a line, a plane, or not at all. THREE planes may intersect at a point though...
No, that is not true.
A point can be intersected by infinitely many lines. Two points intersect in only one line. Three points either intersect in a line or not at all. This is only considering two dimensions.
Perpendicular lines intersect at one point only.
what of a triangle has three line segments that intersect only at their endpoints