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# Geometry Project John Hoang Block 1

## on Dec 11, 2009

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## Geometry Project John Hoang Block 1Presentation Transcript

• Geometry in the Real World
John Hoang
Block 3
Theme: Sports
• Point
An undefined term in geometry, It defines a location and has no size.
• Line (Segment)
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° 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 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
A three-dimensional surface, all points of which are equidistant from a fixed point.
• Rhombus
A quadrilateral whose four sides all have the same length.
• Oval
An object having the general form or shape of an egg.
• Star
A figure usually having five or six points radiating from or disposed about a center.