Geometry in the Real World

Kristen TegzeP2

Point

a zero-dimensional figure; while usually left undefined, has four main representations - the dot, the node,

the location, and the ordered pair of numbers.

Line (Segment)

A straight line which links two points without extending beyond them.

Plane

A two-dimensional group of points that goes on infinitely in all directions; made up of infinite

lines.

Angle

A shape, formed by two lines or rays diverging from a common point (the vertex).

Perpendicular Lines

A line is perpendicular to another if it meets or crosses it at right angles (90°).

Parallel Lines

Lines are parallel if they lie in the same plane, and are the same distance apart over their

entire length.

Triangle

A closed figure consisting of three line segments linked end-to-end.

A 3-sided polygon.

Right Triangle

A triangle where one of its interior angles is a right angle (90 degrees).

Pentagon

A number of coplanar line segments, each connected end to end to form a closed shape.

Hexagon

A polygon with 6 sides.

Square

A 4-sided regular polygon with all sides equal and all internal angles 90°.

Rectangle

A 4-sided polygon where all interior angles are 90°.

Trapezoid

A quadrilateral which has at least one pair of parallel sides.

Parallelogram

A quadrilateral with both pairs of opposite sides parallel and equal in length.

Circle

A line forming a closed loop, every point on which is a fixed distance from a center point.

Cylinder

A Cylinder is a three-dimensional geometric figure that has two congruent and parallel

bases.

Sphere

A three-dimensional surface, all points of which are equidistant from a fixed point.

A spherical object or figure.

Octagon

A polygon with 8 sides.

Decagon

A polygon with ten sides and ten angles.

Nonagon

A nine-sided polygon.

All Done!!!!