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Lessons 5-1 and 5-2 Vocabulary

Name: ___________________________________
Date: ____________________ Block: __________
Across
(p. 325) When three or more lines intersect at a common point, the lines are called __________ lines.
(p. 335) Centroid Theorem - The medians of a triangle intersect at a point called the centroid that is two ______ of the distance from each vertex to the midpoint of the opposite side.
(p. 337) Every triangle has three altitudes. If extended, the altitudes of a triangle intersect in a(n) ______ point.
(p. 325) The point where concurrent lines intersect is called the point of ___________.
(p. 336) The center of gravity is the point at which the region is ______ under the influence of gravity.
(p. 325) The point of concurrency of the perpendicular bisectors is called the ____________ of the triangle.
(p. 326) The prefex circum- means about or ______.
(p. 337) The height is used to calculate the triangle's ____.
(p. 324) If a bisector is also _____________ to the segment, it is called a(n) _____________ bisector.
(p. 326) The bisector of an angle can be described as the locus of points in the ________ of the angle equidistant from the sides of the angle.
(p. 325) A triangle has _____ sides, so it also has _____ perpendicular bisectors.
(p. 324) A segment _________ is any segment, line, or plane that intersects a segment at its midpoint.
(p. 336) The centroid is also the balancing point or center of _______ for a triangular region.
(p. 335) The point of concurrency of the medians of a triangle is called the ________ and is always inside the triangle.
(p. 337) An altitude can lie in the interior, ________, or on the side of a triangle.
Down
(p. 326) The _____________ of a circle is the distance around it.
(p. 324) A(n) _____ is a set of points that satisfies a particular condition.
(p. 324) The perpendicular bisector of a segment is the locus of points in a plane __________ from the endpoints of the segment.
(p. 324) If a point is equidistant from the endpoints of a segment, then it is on the perpendicular bisector of the segment.
(p. 326) The angle bisector can be a line, segment, or ___.
(p. 337) The length of an altitude is known as the ______.
(p. 326) An angle bisector divides an angle into two _________ angles.
(p. 337) The lines containing the altitudes of a triangle are concurrent, intersecting at a point called the ___________.
(p. 328) The incenter is the center of a circle that intersects each side of the triangle at ___ point.
(p. 335) A(n) ______ of a triangle is a segment with endpoints being a vertex of a triangle and the midpoint of the opposite side.
(p. 336) All polygons have a _______ point or centroid.
(p. 337) Another triangle center is the ______ point, which minimizes the sum of the distances from the three vertices.
(p. 325) The perpendicular bisector of a side of a triangle does not necessarily pass through a(n) ______ of the triangle.
(p. 328) The angle bisectors of a triangle are concurrent, and their point of concurrency is called the ________ of a triangle.
(p. 324) Perpendicular Bisector _______ - If a point is on the perpendicular bisector of a segment, then it is equidistant from the endpoints of the segment.
(p. 337) A(n) ________ of a triangle is a segment from a vertex to the line containing the opposite side and perpendicular to the line containing that side.
(p. 326) The circumcenter can be on the interior, exterior, or ____ of a triangle.