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NAME
5
DATE
PERIOD
Unit 5 Vocabulary
altitude
centroid
circumcenter
concurrent lines
incenter
orthocenter
perpendicular bisector
point of concurrency
median
Write whether each sentence is true or false. If false,
replace the underlined word or number to make a true
sentence.
1. The altitude of a triangle is a segment whose endpoints are a
vertex of a triangle and the midpoint of the side opposite the
vertex.
1. False, median
2. The centroid of a triangle is the point where the altitudes of
the triangle intersect.
2. False, orthocenter
Choose the correct term to complete each sentence.
3. The point of concurrency of the perpendicular bisectors of a
triangle is called the (circumcenter, centroid).
3. circumcenter
4. The (incenter, orthocenter) of a triangle is the intersection
of the angle bisectors of the triangle.
4. incenter
5. The sum of the measures of any two sides of a triangle is
(greater, less) than the measure of the third side.
5. greater
Choose from the terms above to complete each sentence.
6. A(n)
is a segment that joins a vertex of a
triangle and is perpendicular to the side opposite to the
vertex.
6. altitude
7. The
vertices of the triangle.
7. circumcenter
of a triangle is equidistant from the
Define each term in your own words.
8.
8. concurrent lines
3 lines that intersect at one point
9. angle bisector
9.
a segment that cuts an angle into two congruent angles
Chapter 5
48
Glencoe Geometry