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**2**

13

Area is the ENTIRE INSIDE of a shape

It is always measured in “squares” (sq. inch, sq ft)

Slide 14

14

AREA

Square units means that “that” many squares fit inside that shape (if measured in feet…it’s feet…if meters…it’s meters. In this example the area is 4 square units…note 4 squares fit)

1

2 units (ft, in, m)

2

3

4

Slide 15

15

Length x Width=Area

2

Length(2) xWidth(2) = 4 square units

Slide 16

16

Same idea as squares & rectangles, but they change the words to Base (length:bottom of shape) and height (width)

Slide 17

17

Parallelogram Area

Area=Base x Height

(Area=length x width)

BASE (length)

Height (width)

8

5

Base 8 x Height 5 = Area 40

The diagonal line is NOT

the height!!!

Slide 18

18

Area= S^2

Area= Side x Side (side squared) (just a different way of saying length x width)

Side one

Side two

Slide 19

19

Length x Width = Area

Side x Side = Area

Base x Height = Area

Slide 20

20

½ Base x Height = Area

(It’s ½ because ½ of the “square” is missing)

Base

Height

Height

Base

8

5

½ Base x Height = Area

½ (8) x 5 = Area

4 x 5 = 20

Slide 21

21

Pi= 3.14

Radius: from center (origin) of circle to ANY side

Area= pi x (Radius x Radius)

Slide 22

22

Perimeter/Circumference = pi x diameter

Pi is always 3.14

Circumference is a fancy name for perimeter

The diameter is a line from one side to the other side of a circle through its origin (It’s twice the radius)

If the radius is 5, then the diameter is 10

Slide 23

23

Area of a circle

Area = piR^2

Pi = 3.14 and R=Radius

Radius

5

Area=3.14 x (5 x 5)

Perimeter = 3.14 x 10

- Formulas for Geometry
- Perimeter
- Square/Rectangle Formula
- Other shapes
- Odd shapes
- Area
- Area of Squares/Rectangles
- Parallelogram Area
- Real formula for area of squares
- Different Names/Same idea
- Area of a Triangle
- Area of a Circle
- Circumference of a Circle

- Gravitation
- Upcoming Classes
- Space Radiation
- Mechanical, Electromagnetic, Electrical, Chemical and Thermal
- Sensory and Motor Mechanisms
- Direct heat utilization of geothermal energy
- The Effects of Radiation on Living Things

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