Perimeter

1
Perimeter Area

• Geometry

2
Rectangle
W (width)

• Perimeter
• P2l 2w
• Area
• Alw

l (length)
3
Square

• Perimeter
• P4s
• Area
• As2

S (side)
4
Parallelogram
height
base
Perimeter P2l 2w Area Abh
5
Triangle

• Perimeter
• Pabc
• Area
• A ½ bh

a
c
h (height)
b (base)
6
Trapezoid
Base 1

height
height
Base 2
(base 1 base 2) 2
Perimeter Add the distance of the sides Area
height(base 1 base 2)
2
7
Circle

• Diameter
• d2r
• Circumference
• C2pr
• Area
• Apr2

diameter
radius
8
Example Find the perim. area of the figure.

• P2l 2w
• P2(5in)2(3in)
• P10in6in
• P16in
• Alw
• A(5in)(3in)
• A15in2

5 in
3 in
9
Ex Find the perim. area of the figure.

• P4s
• P4(20m)
• P80m
• As2
• A(20m)2
• A400m2

20 m
10
Ex Find the perim. area of the figure.
9 in
8 in
20 in
P 2(20in)2(9in)
A b x h
P40in18in
A (20in)(8in)
P58in
A 160in2
11
Ex Find the perim. area of the figure.

• Pabc
• P5ft7ft6ft
• P18 ft
• A ½ bh
• A ½ (7ft)(4ft)
• A ½ (28ft2)
• A 14ft2

5 ft
4 ft
7 ft
6 ft
12
Ex Find the perim. area of the figure.
12 ft
11 ft
11 ft
10 ft
15 ft
A 10ft(12ft15ft) 2
P 11ft12ft11ft15ft
P 49 ft
A 270ft 2
A 135 ft
13
Ex Find the circumference area of the circle.

• C2pr
• C2p(5in)
• C10p in
• C31.4 in
• Apr2
• Ap(5in)2
• A25p in2
• A78.5 in2

10in