A series of points that extends in two opposite directions without end.
What is a line?
100
Another name for an if-then statement.
What is a conditional?
100
If a transversal intersects two parallel lines, then corresponding angles are congruent.
What is Corresponding Angles Postulate?
100
The congruent sides of an isosceles triangle.
What is legs?
100
When three or more lines intersect in one point.
What is concurrent?
200
A flat surface that has no thickness.
What is a plane?
200
Two angles whose sides form two pairs of opposite rays.
What is vertical angles?
200
A line that intersects two coplanar lines at two distinct points.
What is a transversal?
200
If two sides of a triangle are congruent, then the angles opposite those sides are congruent.
What is the Isosceles Triangle Theorem?
200
If a segment joins the midpoints of two sides of a triangle, then the segment is parallel to the third side, and is half its length.
What is Triangle Midsegment Theorem?
300
If three points A, B, and C are collinear and B is between A and C, then AB + BC = AC.
What is Segment Addition Postulate?
300
Two coplanar angles with a common side, a common vertex, and no common interior points.
What is adjacent angles?
300
If a transversal intersects two parallel lines, then same-side interior angles are supplementary.
What is Same-Side Interior Angles Theorem?
300
A statement that follows immediately from a theorem.
What is a corollary?
300
If a point is on the bisector of an angle, then the point is equidistant from the sides of the angle.
What is Angle Bisector Theorem?
400
Points and lines in the same plane.
What is coplanar?
400
Two angles whose measures have a sum of 90.
What is complementary angles?
400
If a transversal intersects two parallel lines, then alternate interior angles are congruent.
What is Alternate Interior Angles Theorem?
400
In a right triangle, the side opposite the right angle is the longest side.
What is the hypotenuse?
400
In a triangle, the point of concurrency of the medians.
What is centroid?
500
Coplanar lines that do not intersect.
What is parallel lines?
500
Two angles whose measures have a sum of 180.
What is supplementary angles?
500
A closed plane figure with at least three sides that are segments.
What is a polygon?
500
If the hypotenuse and a leg of one right triangle are congruent to the hypotenuse and a leg of another right triangle, then the triangles are congruent.
What is the Hypotenuse-Leg (HL) Theorem?
500
If a point is on the perpendicular bisector of a segment, then it is equidistant from the endpoints of the segment.