Geometry VocabularyGeometry Vocabulary

Mrs. LeCompteMrs. LeCompte

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What is Geometry?What is Geometry?

Geometry is the study of shapesGeometry is the study of shapes They studied Geometry in Ancient They studied Geometry in Ancient

Mesopotamia & Ancient EgyptMesopotamia & Ancient Egypt Geometry is important in the art and Geometry is important in the art and

construction fieldsconstruction fields

Grade Level ExpectationsGrade Level Expectations

GLE 23: Define and apply the terms GLE 23: Define and apply the terms measure, distance, midpoint, bisect, measure, distance, midpoint, bisect, bisector, and perpendicular bisector. bisector, and perpendicular bisector.

(G-2-M)(G-2-M) GLE 24: Demonstrate conceptual and GLE 24: Demonstrate conceptual and

practical understanding of symmetry, practical understanding of symmetry, similarity, and congruence and identify similarity, and congruence and identify similar and congruent figures. (G-2-M)similar and congruent figures. (G-2-M)

GLE 25: Predict, draw, and discuss the GLE 25: Predict, draw, and discuss the resulting changes in lengths, orientation, resulting changes in lengths, orientation, angle measures, and coordinates when angle measures, and coordinates when figures are translated, reflected across figures are translated, reflected across horizontal or vertical lines, and rotated on horizontal or vertical lines, and rotated on a grid. (G-3-M) (G-6-M)a grid. (G-3-M) (G-6-M)

POINTPOINT

A POINT is an exact location on a graph, A POINT is an exact location on a graph, shape or in “space”.shape or in “space”.

The Hershey Kiss is a POINT on the lineThe Hershey Kiss is a POINT on the line

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LINELINE

A LINE goes in opposite directions and A LINE goes in opposite directions and never, never, never ends.never, never, never ends.

Imagine if this Twizzler went on forever and ever and ever and ever and ever and ever

RAYRAY

A RAY is part of a line, but it has one A RAY is part of a line, but it has one endpoint and the other end keeps going.endpoint and the other end keeps going.

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Endpoint

Raaaaaaaaaaaaaaaaaaaaaaaayyyyyyyyyyyyyyyyyyyyyyyyyyy

ENDPOINTENDPOINT

An ENDPOINT is a point at the end of a An ENDPOINT is a point at the end of a ray or line segment.ray or line segment.

Endpoint

MidpointMidpoint The The midpointmidpoint of a segment separates of a segment separates

it into two parts of equal length.it into two parts of equal length.

midpointmidpoint

LINE SEGMENTLINE SEGMENT

A LINE SEGMENT is part of a ray or line.A LINE SEGMENT is part of a ray or line. It has two endpointsIt has two endpoints

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Line Segment

Line Line

Ray

●Endpoints

VERTEXVERTEX

A VERTEX is a fancy name for “angle”A VERTEX is a fancy name for “angle” Two rays or lines that have the same Two rays or lines that have the same

endpoint make a VERTEX/angleendpoint make a VERTEX/angle VERTEX/angles are measured in VERTEX/angles are measured in

“degrees”“degrees” Plural form of vertex is verticesPlural form of vertex is vertices

The Corners of a square are its vertex/angles

When two lines cross, they make vertex/angles

The EndThe End

Once you study all the “fancy words”, Once you study all the “fancy words”, Geometry is very easy to understand…so Geometry is very easy to understand…so STUDY!STUDY!