Area and Perimeter

What is perimeter? The distance around a figure.

Perimeter of Polygons Add the lengths of ALL the sides together 10 cm. 5 cm = 30 cm.

What is area? The amount or size of a surface or plane. Area

10 x 5 = Area of Rectangles Area = Length x Width 10 cm. 5 cm. 50 cm. 2 l w

9 x 4 = Area of Parallelograms Area = Base x Height 4 in. 9 in. 36 in. 2 b h

4 x 5= ½ 8 x 5 Area of Triangles Area = ½ base x height 5 m. 8 m. 20 m. 2 b h

Volume of Rectangles Volume = Length x Width x Height V= 12 x 3 x 2= 72cm. 3 L= 12cm H=3cm W=2cm

Let’s Give it a Try

6 x 8 = Find the area Area = Base x Height 8 in. 6 in. 48 in. 2 b h

10 x 8 = Find the area of this rug Area = Length x Width 10 ft. 8 ft. 80 ft. 2 l w

6 x 13= ½ 12 x 13 Find the area inside this pool ball rack Area = ½ base x height 13 in. 12 in. 78 in. 2 b h

= Junior wants to build a rectangular dog pen for his dog Fido. If he wants to make a pen that is 10 feet in length and 12 feet in width, how much fencing will he need to buy? Perimeter = l + l + w + w 44 ft.

A= 200 x 100 = Justin is planning on putting some fertilizer down on his lawn. His lawn is shaped like a parallelogram with a height of 100 feet and a base of 200 feet. Approximately, how many square feet will Justin need to cover? Area = Base x Height 20,000 ft. 2

Find the Volume If a shoe box has a height of 4cm, a width of 5 cm and length of 9cm, what is the volume of the box? V=LxWxH

Practice: Go to this site to practice area and Perimeter: html html Homework Time! Area and Perimeter Practice Handout