Geometry For Dummies

1. Geometry for Dummies By: Chase Callaway Block 4

2. Point An undefined term in geometry, it names a location and has no size.

3. Line (Segment) A segment of 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 has 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* 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 points in a plane that are a fixed distance from a given point called the center of a circle.

17. Cylinder A 3-D figure with two parallel congruent circular bases and a curve lateral surface that connects the bases.

18. Sphere The set of points in a space that are a fixed distance from a given point called the center of the sphere.

19. Parabola A plane curve formed by the intersection of a right circular cone with a plane parallel to a generator of the cone; the set of points in a plane that are equidistant from a fixed line and a fixed point in the same plane or in a parallel plane.

20. Octagon An eight-sided polygon.

21. Pyramids A polyhedron formed by polygonal base and triangular lateral faces that meet at a common vertex.