Geometry Unit 2 Vocabulary Chart

Front 1

Parallel Lines

Back 1

Coplanar lines that do not intercept.

Front 2

Angle Bisector

Back 2

A ray that divides an angle into two congruent angles

Front 3

Included Angle

Back 3

The angle of a polygon that is an angle formed by two sides.

Front 4

Isosceles triangle

Back 4

A triangle with at least two sides congruent.

Front 5

Plane

Back 5

A flat surface made up of points that has no depth and expands indefinitely in all directions.

Front 6

Included Side

Back 6

The side of a polygon that is a side of each of two angles.

Front 7

Circle

Back 7

The locus of all point in a plane equidistant from a given point called the center.

Front 8

Midpoint

Back 8

The point of a segment exactly halfway between the endpoints of the segment.

Front 9

Obtuse angle

Back 9

An angle with a degree measure greater than 90 but less than 180.

Front 10

Acute Angle

Back 10

An angle with a degree measure less than 90.

Front 11

Radius

Back 11

Any segment with endpoints that are the center of the circle and a point on the circle.

Front 12

Equilateral Triangle

Back 12

A triangle with all sides congruent.

Front 13

Line segment

Back 13

A measureable part of a line that consists of two points and all of the points between them.

Front 14

Corresponding

Back 14

Matching parts of congruent polygons.

Front 15

Line

Back 15

Made up of points and has no thickness or width and extends indefinitely in two directions.

Front 16

Perpendicular lines

Back 16

Lines that intersect to form right angles.

Front 17

Right Angle

Back 17

An angle with a degree measure of 90.