Geometry in the Geometry in the Real World!Real World!

Sam LassiterSam LassiterPeriod-5Period-5

Point!Point! Definition: A Definition: A pointpoint is an exact position or is an exact position or

location on a plane surface.location on a plane surface.

Line!Line! Definition: A Definition: A line segment line segment is a part of a is a part of a

line that is bounded by two end points, line that is bounded by two end points, and contains every point on the line and contains every point on the line between its end points.between its end points.

Plane!Plane! Definition: A surface containing all the Definition: A surface containing all the

straight lines that connect any two points straight lines that connect any two points on it.on it.

Angle!Angle! Definition: A shape, formed by two lines Definition: A shape, formed by two lines

or rays diverging from a common point.or rays diverging from a common point.

Perpendicular Perpendicular Lines!Lines!

Definition: Two lines that intersect to form Definition: Two lines that intersect to form a 90 degree angle.a 90 degree angle.

Parallel Lines!Parallel Lines! Definition: Parallel lines remain the Definition: Parallel lines remain the

same distance apart over their entire same distance apart over their entire length.length.

Triangle!Triangle! Definition: A three sided polygon.Definition: A three sided polygon.

Right Triangle!Right Triangle! Definition: A Definition: A right triangleright triangle is where is where

there are two 45 degrees angles and one there are two 45 degrees angles and one 90 degree. 90 degree.

Pentagon!Pentagon! Definition: A plane figure having five Definition: A plane figure having five

angles, and consequently, five sides; any angles, and consequently, five sides; any figure having five angles.figure having five angles.

Hexagon!Hexagon! Definition: A polygon with 6 sides.Definition: A polygon with 6 sides.

Square!Square! Definition: A plane figure having equal Definition: A plane figure having equal

sides.sides.

Rectangle!Rectangle! Definition: A Definition: A rectanglerectangle is a four-sided is a four-sided

polygon where every angle is a right polygon where every angle is a right angle.angle.

Trapezoid!Trapezoid! Definition: A quadrilateral having two Definition: A quadrilateral having two

parallel sides.parallel sides.

Parallelogram!Parallelogram! Definition: Opposite sides are parallel and Definition: Opposite sides are parallel and

equal in length, and opposite angles are equal in length, and opposite angles are equal.equal.

Circle!Circle! Definition: A plane curve everywhere Definition: A plane curve everywhere

equidistant from a given fixed point, the equidistant from a given fixed point, the center.center.

Cylinder!Cylinder! Definition: An object or shape with Definition: An object or shape with

straight sides and circular ends of equal straight sides and circular ends of equal size.size.

Sphere!Sphere! Definition: A three-dimensional surface, Definition: A three-dimensional surface,

all points of which are equidistant from a all points of which are equidistant from a fixed point. fixed point.

Octagon!Octagon! Definition: A plane figure with eight angles Definition: A plane figure with eight angles

and eight sides. and eight sides.

Polygon!Polygon! Definition: Definition:

A closed A closed plane plane figure figure bounded by bounded by three or three or more line more line segments. segments.

Parabola!Parabola! Definition: A plane Definition: A plane

curve formed by the curve formed by the intersection of a intersection of a right circular cone right circular cone and a plane parallel and a plane parallel to an element of the to an element of the cone or by the locus cone or by the locus of points equidistant of points equidistant from a fixed line and from a fixed line and a fixed point not on a fixed point not on the line.the line.