Finding Perimeter and

Area Review

PerimeterThe distance around the outside of an object.

10 feet

8 feet 8 feet

10 feet

Perimeter = 10 + 8 +10 +8 = 36 feet

Find the Perimeter

6 in

11 in

Answer: 6+6+11+11 = 34 in

13 cm

10 cm

12 cm

Answer: 10+10+13+13 = 46 cm

Find the Perimeter

13 in

5 in 5 in

4 in

8 in

Answer: 13 + 4 + 5 + 5 = 27 in

Find the Perimeter

15 cm 15 cm

12 cm

Answer: 15 + 15 +12 =42 cm

11 cm

Find the Perimeter

Finding Area of a Rectangle

Area of a Rectangle: L x W (length x width)

Square 4 sides all sides equal right angles

Rectangle 4 sides opposite sides equal right angles

Area of a Square: L x W (length x width)

Which is also S x S or S2

Find the Area

6 in

11 in

Answer: 6(11)= 66 in2

Find the Area

4 in

4 in

Answer: 4(4) = 16 in2

Finding Area of a Triangle

Area of a Square = S2

Area of Triangle = ½ S2

S

S

L

WArea of a Rectangle = L x WArea of Triangle = ½ L x W

= b

= h

Area of Triangle = ½bh

Find the Area

13 cmAnswer:

12 cm

27821213 cmA

Find the Area

13 cm

10 cmAnswer:

12 cm

10 x 12A = 2 = 60 cm2

Finding Area of a Parallelogram

Area of a Rectangle = L x W

= b

S

Area of Parallelogram = bh

h

L

W

Finding Area of a Rhombus

Area of a Square = S x S or S2

= b

Area of Rhombus = bh

h

S

S

Find the Area

7 cm

3 cm

5 cm

Answer: 3 (5) = 15 cm2

Find the Area

9 cm

5 cm

7 cm

Answer: 7 (5) = 35 cm2

Finding Area of a Trapezoid

Area of Trapezoid = b1 + b2 x h 2

b1

b2

h

Find the Area. 10 in

4 in 4 in

2 in

Answer:

8 in

2482

8)210( in

Finding Area of a Kite

Area of a Kite = pq 2

p

q

Find the Area

Answer = 10 x 8 = 40 cm2

2

p

10 cm

8 cm

Finding Area and Circumference of Circles

π = 3.14

Diameter – the distance from one side of a circle to the other through the center

Radius – the distance from the center of a circle to the side

½ of the diameter

Area of a Circle = πr2Circumference of a Circle = 2πr or πd

Find Area and Circumference

A= πr2C= πd

d = 14 cm

C= 3.14(14) C= 43.96 cm

A= 3.14(7)2A= 153.86 cm2