1. Real World Examples Jonathan McAuley

2. Point Definition - A point is one place that shows a specific “point” Real World Example - A pencil Point would be one. The tip of the pencil represents one point and you could touch it on a piece of paper and make a point or 2 to form a line. Postulates, Theorems, and Corollaries - If 2 lines intersect, they intersect exactly one point.

3. Line Definition - A line goes on infinitely in both directions and expands pass 2 points. Real World Example - A real world example would be a railroad bc it goes on in each direction. Postulates, Theorems, and Corollaries - If a line goes through 2 points and goes on forever through 2 points it is a line.

4. Plane Plane - A plane is 3 points that lie in the same place and expands infinitely in all directions. Real World Example - The Earth would be an example of a plane because it expands in each direction. Postulates, Theorems, and Corollaries - If two points lie in a plane, then the line containing those points lies in the plane.

5. Segment Definition - A segment is straight and finite. Real World Example - A real world example would be poptart. The edge of the poptart is straight and doesn’t go on forever in either direction. Postulates, Theorems, and Corollaries - “Segment Addition.” If B is between A and C, then B + BC = AC

6. Ray Definition - A ray goes infinitely in only one direction. Real World Example - A tennis player serving a tennis ball could be an example of a ray bc it goes in 1 direction. Postulates, Theorems, and Corollaries -

7. Collinear Points Definition - It is 3 points that are all on the same line. Real World Example - These 3 people sitting next to each other is an example of this. Postulates, Theorems, and Corollaries -

8. Acute Angle Definition - It’s an angle less than 90 degrees. Real World Example - A real world example would be a single slice of Pizza. This picture especially shows bc it shows the pizza and the position it came from because it is also an acute angle. Postulates, Theorems, and Corollaries -

9. Obtuse Angle Definition - It’s an angle greater than 90 degrees. Real World Example - A boomerang would be a real world example because the inside and shape of it is more than 90 degrees. Postulates, Theorems, and Corollaires -

10. Right Angle Definition - Its an angle that is equal to 90 degrees. Real World Example - The bottom of the chair with the chair legs are an example. Postulates, Theorems, and Corollaries -

11. Perpendicular Lines Definition - 2 Lines intersect to form a 90 degrees angles. Real World Example - A cross has 4 90 degree angles and definitely represents this. Postulates, Theorems, and Corollaries -

12. Complementary Angles Definition - 2 Angles to form 90 degrees. Real World Example - I have 2 real world examples. One is an cross roads which forms a 90 degrees angle and the other is a corner of a cross that also forms a 90 degree angle. Postulates, Theorems, and Corollaries -

13. Supplementary Angles Definition - 2 angles to make 180 degrees angle. Real World Example - This road shows a 180 degree angle.

14. Right Triangles Definition - A triangle that has a 90 degrees angle (Right angle) The side is also 90 so the other 2 are 45. Real World Example - Half a sandwich would be an example because you can see it has a right angle.

15. Vertical Angles Definition - They’re are the angles opposite of eachother when lines cross and they are always equal. Real World Example - A railroad cross sign is an example because they cross to form angles across from each other that are equal.

16. Equilateral Triangles Definition - All sides of a triangle are the same. Real World Example - A pool triangle could be an example because all 3 sides are equal in distance.

17. Acute Triangle Definition - A triangle that has an angle less than 90 degrees. Real World Example - A runner running down a slope is one because it is going down because of the angle being smaller and less than 90.

18. Isosceles Triangle Definition - It’s a triangle that has 2 equal sides and 2 equal angles. Real World Example - A clothes hanger is an example because it forms down and 2 of the sides are equal and the other is longer.

19. Obtuse Triangle Definition - It’s a triangle that has an angle greater than 90 degrees. Real World Example - A fanner be an example because it expands out a little further and forms an obtuse angle.

20. Scalene Triangle Definition - It’s a triangle with no equal sides. Real World Example - The shaping of this bicycle is one because the triangle in it has 3 unequal sides in measure.