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19 Cards in this Set
- Front
- Back
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altitude of a triangle
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perpendicular segment from a vertex to the line containing the side opposite that vertex
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centroid
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the point of intersection of the medians of that triangle
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circumcenter of a circle
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the point of concurrency of the perpendicular bisectors of a triangle
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circumscribed about
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A circle is circumscribed about a polygon if the vertices of the polygon are on the circle. A polygon is circumscribed about a circle if all the sides of the polygon are tangent to the circle
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concurrent
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three or more lines that meet in one point
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contrapositive
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switches the hypothesis and the conclusion and negates both
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coordinate proof
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a figure is drawn on the coordinate plane and the formulas of slope, midpoint, and distance are used to prove properties of the figure.
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distance from a point to a line
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is the the length of the perpenduclualr segment form the pint to the line
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equivalence statements
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statements with the same truth value
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incenter of a triangle
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point of concurrency of the angle bisectors of a triangle
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indirect proof
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proof that involves the use of indirect reasoning
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indirect reasoning
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a type of reasoning in which all possibilities are considered and then all but one are proved false. The remaining possibility must be true.
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inscribed in
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a circle is inscribed in a polygon if the sides of the polygon are tangent to the circle. A polygon is inscribed in a circle if the vertices of the polygon are on the circle.
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inverse
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Negation of both hypothesis and conclusion
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median of a triangle
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segment whose endpoints are a vertex and the midpoint of the opposite side
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midsegment
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segment that connects the midpoints of two sides
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negation
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statement that has the opposite truth value
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orthocenter if a triangle
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point of concurrency of the altitudes of a triangle
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point of concurrency
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point where 3 or more lines intersect
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