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14 Cards in this Set
- Front
- Back
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Concurrent lines
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2 or more lines that meet at a single point
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Perpendicular Bisector of a Triangle
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A line that is perpendicular to and bisects ANY sides of a triangle
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Circumcenter
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The common point of intersection of all 3 perpendicular bisectors of the same triangle
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Angle Bisectors of a Triangle
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A line that bisects ANY angle of a triangle
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Incenter
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The common point of intersection of all 3 angle bisectors of the same triangle
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Median
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A line whose endpoints are a vertex of a triangle and the midpoint of the side opposite that vertex
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Centroid
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The common point of intersection of all 3 medians of the same triangle
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Altitude
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A line from the vertex of any angle of a triagle, perpendicular to the opposite side OR to a line containing the opposite side
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Orthocenter
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The common point of intersection of all 3 altitudes of a triangle
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Midsegment
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A segment that connects the midpoints of 2 sides of the same triangle
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Midsegment Theorem
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A midsegment is parallel to the 3rd side and 1/2 the length of the 3rd side
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Perpendicular Bisector Theorem
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If a point is on the perp. bisector of a segment, then it is equidistant from the endpoints of the segment
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Angle Bisector Theorem
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If a point is on the bisector of an angle, then it is equidistant (perpendicular) from the sides of the angle
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Triangle Midsegment Theorem
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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
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