Mcdougal Littell Vocab.
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| An unproven statement that is based on observations. | Conjecture
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| A process that includes looking for patterns and making conjectures. | Inductive reasoning
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| An example that shows a conjecture is false. | counterexample
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| A point has no dimension. It is usually represented by a small dot. | point
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| A line extends in one dimension. It is usually represented by a straight line with two arrowheads to indicate that the line extends without end in two directions. | line
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| extends in two dimensions. It is usually represented by a shape that looks like a tabletop or wall. You must imagine that the plave extends without end, even though the drawing of a plane appears to have edges. | plane
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| Points that lie on the same line. | collinear points
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| Points that lie on the same plane. | coplanar points
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| All points on the line that are between the endpoints. | line segment
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| Part of a line that consists of two points. | endpoints
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| All points on the line that extend in one direction. | ray
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| Part of a line that consist of a point | initial point of a ray
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| One ray is pointing in one direction and another ray is pointing the opposite direction. | opposite rays
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| To have one or more points in common. | intersect
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| The set of points that two or more geometric figures have in common. | intersection
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| Rules that are accepted without proof. | postulates
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| Rules that are accepted without proof. | axioms
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| The real number that corresponds to a point on a line. | coordinate
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| The absolute value of the difference between the coordinates of the points. | distance beteen two points on line
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| The distance between the endpoints of a segment. | length of a segment
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| When three points lie on a line, you can say that one of them is between the other two. | between
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| distance between A and B in a coordinate plane | distance formula
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| Segments that have the some length. | congruent segments
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| Consists of two different rays that have the same initial point. The rays are the sides of the angle, and the initial point is the vertex of the angle. | angle
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| Rays of an triangle. | sides
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| Initial point of the angle. | vertex of an angle
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| Angles that have the same measure. | congruent angles
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| All points between the points that lie on each side of the angle. | interior of an angle
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| When the sides of a triangle are extended, the angles that are adjacent to the interior angles. | exterior of an angle
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| An angle with a measure between 0 degrees and 90 degrees. | acute angle
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| An angle with measure between 90 degrees and 180 degrees. | obtuse angles
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| An angle with the measure equal to 90 degrees | right angle
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| An angle with measure equal to 180 degrees. | straight angles
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| Two angles with a common vertex and side but no common interior points. | adjacent angles
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| The point that divides, pr bisects, a segment into two congruent segments. | midpoint
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| To divide into two congruent parts. | bisect
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| A segment, ray, line, or place that intersects a segment at its midpoint | segment bisector
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| A construction tool used to draw arcs. | compass
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| A construction tool used to draw segments. A ruler without marks. | straightedge
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| To draw using a limited set of tools, usually a compass and a straightedge. | construct
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| A geometric drawing that uses a limited set of tools, usually a compass and a straightedge. | construction
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| midpoint formula
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| A ray that divides an angle into two adjacent angles that are congruent. | angle bisector
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| Two angles whose sides form two pairs of opposite rays. | vertical angles
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| Two adjacent angles whose noncommon sides are oppisite rays. | linear pair
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| Two angles whose measures have the sum 90 degrees. | complementary angles
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| The sum of the measures of an angle and its complement is 90 degress. | complement of an angle
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| Two angles whose meeasures have the sum 180 degrees. | supplementary angles
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| The sum of the measure of an angle and its supplement is 180 degrees. | supplement of an angle
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