in the real world geometry
DESCRIPTION
TRANSCRIPT
Geometry In The Real World
By Nick Holt Block 1 A-day
12/11/09
Point
• An undefined term in geometry, it names a location and has no size
Line
• An undefined term in geometry, a line is a straight path that has no thickness and extends forever.
Plane
• An undefined term in geometry, it is a flat surface that has no thickness and extends forever.
Angle
• A figure formed by two rays with a common endpoint.
Perpendicular lines
• Lines that intersect at 90 degree angles.
Parallel lines
• Lines in the same plane that do not intersect.
Triangle
• A three sided polygon.
Right Triangle
• A triangle with one right angle.
Pentagon
• A five-sided polygon.
Hexagon
• A six-sided polygon.
Square
• A quadrilateral with four congruent sides and four right angles.
Rectangle
• A quadrilateral with four right angles.
Trapezoid
• A quadrilateral with exactly one pair of parallel sides.
Parallelogram
• A quadrilateral with two pairs of parallel sides.
Circle
• The set of two points in a plane that are a fixed distance from a given point called the center of the circle.
Cylinder
• A three dimensional figure with two parallel congruent circular bases and a curved lateral surface that connects the bases.
Sphere
• The set of points in space that are a fixed distance from a given point called the center of the sphere.
Cube
• A prism with six square faces
Regular pyramid
• A pyramid whose base is a regular polygon and whose lateral faces are congruent isosceles triangles.
Right cone
• A cone whose axis is perpendicular to the base.