1. Geometry in the Real World By: Myranda Ozuna 2nd Block

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

3. Line (Segment) Line (Segment): A straight line which links two points without extending beyond them.

4. Plane Plane: an undefined term in geometry, it is a flat surface that has no thickness an extends forever.

5. Angle Angle: A figure formed by two rays with a common endpoint.

6. Perpendicular Lines Perpendicular Lines: lines that intersect at 90° angles.

7. Parallel Lines Parallel Lines: Lines that do not intersect.

8. Triangle Triangle: A three-sided polygon.

9. Right Triangle Right Triangle: A triangle with one right (90°) angle.

10. Pentagon Pentagon: A five-sided polygon.

11. Hexagon Hexagon: A six-sided polygon.

12. Square Square: A quadrilateral with four congruent sides an four congruent right (90°) angles.

13. Rectangle Rectangle: A quadrilateral with four right (90°) angles.

14. Trapezoid Trapezoid: A quadrilateral with exactly one pair of parallel lines.

15. Parallelogram Parallelogram: A quadrilateral with two pairs of parallel lines.

16. Circle 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 Cylinder: A three-dimensional figure with two parallel congruent circular bases and a curved lateral surface that connects the bases.

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

19. Cube Cube: A prism with six square faces.

20. Rhombus (Diamond) Rhombus: A quadrilateral with four congruent sides, which is often called a diamond.

21. Decagon (Star) Decagon: A ten-sided polygon, which is often called a star.