Geometry-Ch. 3-Vocab Flashcards Preview

K 8th Grade > Geometry-Ch. 3-Vocab > Flashcards

Flashcards in Geometry-Ch. 3-Vocab Deck (20):
1

sketch

make a freehand drawing of the figure without tools

2

draw

carefully use geometry tools to measure and draw

3

construct

use tools without measurements to construct a figure; there will always be inaccuracy in human measurement

4

segment bisector

line, ray, or segment that passes through the mid midpoint of a segment

5

perpendicular

segment that is perpendicular to the segment

6

median

segment connecting a vertex to the midpoint of the opposite side in a triangle

7

midsegment

a segment that connects the midpoints of two sides of a triangle

8

converse

statement created by switching the if and then parts of a theorem

9

altitude

a perpendicular segment in a triangle from a vertex to the opposite side; height of the triangle; always three per triangle.

10

transversal

line that intersects two other separate lines.

11

alternate interior angles

between two lines intersecting a transversal but on opposite sides of the transversal; equal when two of the lines are parallel

12

alternate exterior angles

on opposite sides of the transversal and outside the two lines it intersects; equal when two of the lines are parallel

13

co-interior angles

two angles on the same side of a transversal and both are interior; supplementary when two of the lines are parallel

14

point of concurrency

point where three or more lines intersect

15

incenter

point of concurrency for angle bisectors of triangle; think INcenter-> INGLES-> anGLES; equidistant from all three sides

16

circumcenter

point of concurrency for perpendicular bisectors of triangle; think CIRcumcenter-> CIRCULAR-> perpendiCULARs; equidistant from vertices

17

orthocenter

point of concurrency for altitudes of triangle; think ORTHOdontists ALTer teeth; ORTHOcenter- ALTitudes of triangle

18

circumscribed

when a figure encloses another and the inside vertices fall on the outside figure

19

inscribed

when a figure is inside of another and its vertices fall on the outside figure

20

centroid

point of concurrency for medians of a triangle; divides medians into ratios of 2:1; center of a triangle's mass

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