enCR20
Transversal: A line which intersects two coplanar lines at two different points.
Incenter: Is equidistant from the three sides of the triangle.
Centroid: The point of concurrency of the three medians of the triangle.
Orthocenter: The point of concurrency of the three altitudes of the triangle.
Circumcenter: Is equidistant from the vertices of the triangle.
Angle Bisector: A segment which bisects an angle of the triangle and whose endpoints are a vertex and a point on the opposite side.
Altitude: A segment from the vertex of the triangle perpendicular to the line containing the opposite side.
Midsegment Theorem: The segment joining the midpoints of two sides of a triangle is parallel to the third side and half as long as the length of the third side.
Concurrent Lines: (Segments or Rays) are lines that intersect in a single point.
Perpendicular Bisector: A line whose points are equidistant from the endpoints of the given side.
Median: A segment whose endpoints are a vertex of the triangle and the midpoint of the opposite side.
Skew Lines: Lines that are noncoplanar and do not intersect.
Parallel Lines: Lines that are coplanar and do not intersect.
Corresponding Angles: A pair of nonadjacent interior and exterior angles on the same side of transversal.
PCAC Postulate: If two parallel lines are cut by a transversal, then corresponding angles are congruent.
PAIC Theorem: If two parallel lines are cut by a transversal, then alternate interior angles are congruent.
PSSIAS Theorem: If two parallel lines are cut by a transversal, then same-side interior angles are supplementary.
Oblique Lines: Are intersecting lines that do not form a right angle.
PAEC Theorem: If two parallel lines are cut by a transversal, then alternate exterior angles are congruent.
Triangle: A ______ is formed by three noncollinear points connected by segments.
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Across:
2.
A ______ is formed by three noncollinear points connected by segments.
5.
A pair of nonadjacent interior and exterior angles on the same side of transversal.
7.
Is equidistant from the vertices of the triangle.
10.
A segment whose endpoints are a vertex of the triangle and the midpoint of the opposite side.
12.
Is equidistant from the three sides of the triangle.
14.
If two parallel lines are cut by a transversal, then alternate interior angles are congruent.
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A line which intersects two coplanar lines at two different points.
19.
A segment from the vertex of the triangle perpendicular to the line containing the opposite side.
20.
The segment joining the midpoints of two sides of a triangle is parallel to the third side and half as long as the length of the third side.
Down:
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The point of concurrency of the three altitudes of the triangle.
3.
If two parallel lines are cut by a transversal, then same-side interior angles are supplementary.
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Are intersecting lines that do not form a right angle.
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A line whose points are equidistant from the endpoints of the given side.
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The point of concurrency of the three medians of the triangle.
9.
If two parallel lines are cut by a transversal, then corresponding angles are congruent.
11.
(Segments or Rays) are lines that intersect in a single point.
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A segment which bisects an angle of the triangle and whose endpoints are a vertex and a point on the opposite side.
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Lines that are coplanar and do not intersect.
16.
If two parallel lines are cut by a transversal, then alternate exterior angles are congruent.