Geometry Crossword

either of two angles whose sum is 180°.
either of two angles whose sum is 90°.
A straight line which links two points without extending beyond them.
is a line with a single endpoint (or point of origin) that extends infinitely in one direction.
is the smaller angle. It is more than 90° and less than 180°
an angle of 90°, as in a corner of a square or at the intersection of two perpendicular straight lines.
is an angle smaller than a right angle.
an angle of 180°.
have the same angle (in degrees or radians). That is all. They don't have to point in the same direction. They don't have to be on similar sized lines.
A pair of angles that is formed when two lines intersect. Two angles are said to be lineal if they are adjacent angles formed by two intersecting lines. The measure of a straight angle is 180 degrees, so a lineal pair of angles must add up to 180 degrees.
is the middle point of a line segment. It is equidistant from both endpoints, and it is the centroid both of the segment and of the endpoints. It bisects the segment.
two lines that never intersect — think of an equal sign.
is the relationship between two lines which meet at a right angle.
bisection is the division of something into two equal or congruent parts, usually by a line
are non-adjacent angles formed by a pair of intersecting lines. You can think of them as the opposite angles that appear in the "bow-tie" formed when two lines intersect.