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.
Is equidistant from the vertices of the triangle.
6.
A segment which bisects an angle of the triangle and whose endpoints are a vertex and a point on the opposite side.
8.
A segment from the vertex of the triangle perpendicular to the line containing the opposite side.
11.
Lines that are coplanar and do not intersect.
12.
If two parallel lines are cut by a transversal, then corresponding angles are congruent.
15.
If two parallel lines are cut by a transversal, then alternate interior angles are congruent.
16.
If two parallel lines are cut by a transversal, then alternate exterior angles are congruent.
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Lines that are noncoplanar and do not intersect.
19.
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.
20.
If two parallel lines are cut by a transversal, then same-side interior angles are supplementary.
Down:
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A pair of nonadjacent interior and exterior angles on the same side of transversal.
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Is equidistant from the three sides of the triangle.
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The point of concurrency of the three altitudes of the triangle.
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A line whose points are equidistant from the endpoints of the given side.
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(Segments or Rays) are lines that intersect in a single point.
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Are intersecting lines that do not form a right angle.
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A line which intersects two coplanar lines at two different points.
13.
A ______ is formed by three noncollinear points connected by segments.
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A segment whose endpoints are a vertex of the triangle and the midpoint of the opposite side.
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The point of concurrency of the three medians of the triangle.