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BASIC ELEMENTS OF GEOMETRY

BASIC ELEMENTS OF GEOMETRY. FOLDABLE GEOMETRIC TERMS Basic Elements of Geometry

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Page 1: BASIC ELEMENTS OF GEOMETRY. FOLDABLE GEOMETRIC TERMS Basic Elements of Geometry

BASIC ELEMENTS OF GEOMETRY

Page 2: BASIC ELEMENTS OF GEOMETRY. FOLDABLE GEOMETRIC TERMS Basic Elements of Geometry

FOLDABLE

Page 3: BASIC ELEMENTS OF GEOMETRY. FOLDABLE GEOMETRIC TERMS Basic Elements of Geometry

GEOMETRIC TERMSBasic Elements of Geometry

Page 4: BASIC ELEMENTS OF GEOMETRY. FOLDABLE GEOMETRIC TERMS Basic Elements of Geometry

Point

Definition: a location in space.

A point is named by a capital letter, and its location may be indicated by a dot.

Write: ASay: Point A

Page 5: BASIC ELEMENTS OF GEOMETRY. FOLDABLE GEOMETRIC TERMS Basic Elements of Geometry

Point

A point is named by its coordinates, and its location may be indicated by a dot.

Write: PSay: Point P

Page 6: BASIC ELEMENTS OF GEOMETRY. FOLDABLE GEOMETRIC TERMS Basic Elements of Geometry

Line

Definition: a set of points that form a straight path extending infinitely in two directions. The directions are opposite of each other.

Write: Say: Line AB

Page 7: BASIC ELEMENTS OF GEOMETRY. FOLDABLE GEOMETRIC TERMS Basic Elements of Geometry

Line Segment

Definition: a part of a line that has two endpoints and a definite length

A BWrite: Say: Line segment AB

AB

Page 8: BASIC ELEMENTS OF GEOMETRY. FOLDABLE GEOMETRIC TERMS Basic Elements of Geometry

Ray

Definition: a set of points that has one endpoint and extends infinitely in one direction

A B C

Write: Say: Ray AB or Ray AC

or AB ACuuur uuur

Page 9: BASIC ELEMENTS OF GEOMETRY. FOLDABLE GEOMETRIC TERMS Basic Elements of Geometry

Angle

Definition: a geometric figure made up of two rays of two line segments that have the same endpoint. The common endpoint is the vertex.

Write: Say: Angle ABC or Angle B

ABC or B

Page 10: BASIC ELEMENTS OF GEOMETRY. FOLDABLE GEOMETRIC TERMS Basic Elements of Geometry

Plane

Definition: a flat surface that extends without end (infinitely) in all directions.

Write: Plane ASay: Plane A A

Page 11: BASIC ELEMENTS OF GEOMETRY. FOLDABLE GEOMETRIC TERMS Basic Elements of Geometry

ANGLESBasic Elements of Geometry

Page 12: BASIC ELEMENTS OF GEOMETRY. FOLDABLE GEOMETRIC TERMS Basic Elements of Geometry

Angle

Definition: a geometric figure made up of two rays of two line segments that have the same endpoint. The common endpoint is the vertex.

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ACUTE ANGLE

Angles that have a measure that is less than 90 degrees.

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RIGHT ANGLE

Angles that have a measure that is exactly 90 degrees.

Page 15: BASIC ELEMENTS OF GEOMETRY. FOLDABLE GEOMETRIC TERMS Basic Elements of Geometry

OBTUSE ANGLE

Angles that have a measure that is greater than 90 degrees but less than 180 degrees.

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STRAIGHT ANGLE

Angles that have a measure that is exactly 180 degrees.

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TRIANGLESBasic Elements of Geometry

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Triangle

Definition: a geometric figure made up of three rays or three line segments.

Write: Say: Triangle ABC or Triangle BCA or Triangle CAB

or ABC BCA or CBAV V V

Page 19: BASIC ELEMENTS OF GEOMETRY. FOLDABLE GEOMETRIC TERMS Basic Elements of Geometry

ACUTE TRIANGLE

A triangle composed of three acute angles.

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RIGHT TRIANGLE

A triangle composed of one right angle and two acute angles.

Page 21: BASIC ELEMENTS OF GEOMETRY. FOLDABLE GEOMETRIC TERMS Basic Elements of Geometry

OBTUSE TRIANGLE

A triangle composed of one obtuse angle and two acute angles.

Page 22: BASIC ELEMENTS OF GEOMETRY. FOLDABLE GEOMETRIC TERMS Basic Elements of Geometry

SCALENE TRIANGLE

A triangle with no congruent sides and no congruent angles.

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ISOSCELES TRIANGLE

A triangle with at least two congruent sides and at least two congruent angles.

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EQUILATERAL TRIANGLE

A triangle with three congruent sides and three congruent angles.

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QUADRILATERALSBasic Elements of Geometry

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Quadrilateral

Definition: a geometric figure made up of four sides and four angles

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RECTANGLE

A quadrilateral with four right angles.Opposite sides are equal in length.

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SQUARE

A quadrilateral with four right angles.All sides are equal in length.

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PARALLELOGRAM

A quadrilateral with opposite sides that are parallel.Opposite sides are equal and opposite angles are equal.

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RHOMBUS

A quadrilateral with opposite sides that are parallel.Opposite sides are equal in length and opposite angles are equal in measure. All sides are equal in length.

Page 31: BASIC ELEMENTS OF GEOMETRY. FOLDABLE GEOMETRIC TERMS Basic Elements of Geometry

TRAPEZOID

A quadrilateral with two sides are parallel and two sides are not parallel.

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KITE

A quadrilateral with two pairs of consecutive congruent sides.

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SYMBOLS AND ABBREVIATIONSBasic Elements of Geometry

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COMMON POLYGONSBasic Elements of Geometry

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