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Geo Chapter 7 & 8

Vocab for 7 & 8

TermDefinition
Interior Angle an angle formed by two sides of a polygon with a common vertex
Auxiliary Line a line that is added to a figure to aid in a proof
Exterior Angle an angle formed by one side of a polygon and the extension of an adjacent side
Remote Interior Angle an interior angle that is not adjacent to the exterior angle
Isosceles Triangle a triangle with at least two congruent sides
Legs the congruent sides of a triangle
Vertex Angle angle formed by legs
Base side opposite of the vertex angle
Base Angles angles that have the base as a side
Equilateral Triangle a triangle with three congruent sides
Equiangular triangle a triangle with three congruent angles
Altitude of a Triangle a perpendicular segment from a vertex to the line containing the opposite side
Centroid of a Triangle the point of concurrency of the three medians of a triangle. *center of gravity*
Circumscribed Circle every vertex of the polygon lies on the circle
Concurrent three or more lines that intersect at the same point
Distance from a Point to a Line the length of the perpendicular segment from the point to the line
Equidistant the same distance from two or more objects
Incenter of a Triangle the point of concurrency of the three angle bisectors of a triangle
Inscribed Circle a circle in which each side of the polygon is tangent to the circle
Median of a Triangle a segment whose endpoints are a vertex of the triangle and the midpoint of the opposite side
Orthocenter of a Triangle the point of concurrency of the three altitudes of a triangle
Point of Currency a point where three or more lines coincide
Circumcenter of a Triangle the point of concurrency of the three perpendicular bisectors of a triangle
Midsegment of a Triangle a segment that joins the midpoints of two sides of the triangle
Created by: user-1713631
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