1. Finding Area and Perimeter of Polygons

2. Area
Definition:
The number of square units needed to cover a surface. (INSIDE)
Length x width

3. Perimeter Definition:
The sum of the length of all the sides of a polygon.

4. Base
Definition:
A side or face of a figure on which the figure stands.

5. Height
Definition:
The distance from the bottom to the top of a figure.

6. Width
Definition:
How wide a figure is from side to side.

7. Length
Definition:
The measure of the distance across an figure.

8. How to find Area.

9. Square
5cm

10. Rectangle
32 mm
2 cm

11. Triangle
10m 4m

12. Parallelogram
40cm
30cm

13. Rhombus
D=5cm
d=4cm
Area= 𝐷𝑥𝑑 2
Example:
5𝑥4 2
20 2
10 𝑐𝑚 2

14. b=3m B=5m Area= 𝐵+𝑏 𝑋ℎ 2 Example: 5+3 4 2 8 4 2 32 2 16 𝑚 2 H=4m
Trapezoid
b=3m
B=5m
Area= 𝐵+𝑏 𝑋ℎ 2
Example:
8 4 2
32 2
16 𝑚 2
H=4m

15. The perimeter of a rectangle is 36cm and it length is 10cm.
Tricky problems
The perimeter of a rectangle is 36cm
and it length is 10cm.
Find the area of the rectangle in square millimeters.