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# in the real world geometry

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### Transcript

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