1. Geometry Point Line Line segment Ray Plane Parallel lines
Intersecting lines
Angles

2. .A Geometry Point Line Line segment An exact location in space
An endless collection of points along a straight path
Line segment
Part of a line that has two endpoints .A

3. Geometry
Ray
Part of a line that has one endpoint and extends endlessly in the other direction
Plane
An endless, flat surface that is named by any three points not on the same line. .A .C .B

4. Geometry Parallel Lines Intersecting Lines Perpendicular Lines
Lines that do not intersect
Intersecting Lines
Lines meet at one point
Perpendicular Lines
Lines form a right angle

5. Angles An angle is formed when two rays have the same endpoint.
This endpoint is called the vertex.
The two rays that form the angle are called sides.

6. Angles There are four types of angles Right angle Straight angle
Acute angle
Obtuse angle

7. Right Angles Forms a square corner Forms a 90 degree angle.
Use a corner of your index card to make sure you a have a right angle
90 degrees

8. Straight Angle Forms a straight line Angle is 180 degrees
Use the edge of your index card to make sure you have a straight angle.
180 degrees

9. Acute Angles Forms an angle that is less than a right angle
Angle is less than 90 degrees

10. Obtuse Angles Form an angle that is more than a right angle
Angle is more than 90 degrees

11. Review Name each picture
Ray
Parallel lines
Line 1. 2. 3.

12. Review Name each picture
Acute angle
Line segment
Point 4. 5. 6.

13. Review Name each picture
Intersecting lines
Perpendicular and Intersecting lines

14. Area and
Perimeter

15. Area is the amount of surface space that a flat object has.
Area is reported in the amount of square units.

16. Would the area of your bedroom or the area of your house be greater?
When you measure the amount of carpet to cover the floor of a room, you measure it in square units. ?
Would the area of your bedroom or the area of your house be greater? ?
You’re right! The area of your house is greater than the area of your bedroom.

17. Count the number of squares.
Lets find the area of this surface if each square is equal to one foot.
Count the number of squares. 1 2
Area = 15 square feet 3 4 5 6 7 8 9 10 11 12 13 14 15

18. The area is equal to 9 square units.
Try this one!
Count the number of green squares to determine the area of this surface. What is the area? 1 2 3 4 5 6 7 8 9
The area is equal to 9 square units.

19. Perimeter
Perimeter is the distance around the outside edge of a flat object.
Perimeter is reported as a total number of linear units.

20. When you measure the amount of wallpaper border to go around a room, you measure it in lengths.?
Would the perimeter of your bedroom or the perimeter of your house be greater? ?
You’re right! The perimeter of your house is greater than the perimeter of your bedroom.

21. Count the number of sides.
Let’s find the perimeter of this surface if each square is equal to one foot.
Count the number of sides.
Perimeter = 24 feet

22. The perimeter is equal to 12.
Try this one!
Count the number of sides to determine the perimeter of this flat object.
The perimeter is equal to 12.

23. Let’s do these problems together.
Two neighbors build swimming pools. This is what the pools look like.
Which family has the pool with the bigger swimming area?
Family B
Family A

24. The area of Family A’s pool is? 8 square units.
The area of Family B’s pool is?
7 square units
Therefore, Family A has the pool with
the bigger swimming area.
Family B
Family A

25. Now look at those same two pools
Now look at those same two pools. Which family has more side panels of the pool to clean?
The perimeter of Family A’s pool is 12 units long.
The perimeter of Family B’s pool is 14 units long.
Therefore, Family B has more side panels of the pool to clean.
Family B
Family A

26. The End