Presentation on theme: "Area perimeter. Perimeter Peri means around Meter means: to measure The word comes form Greek: Perimetron."— Presentation transcript:
Perimeter Peri means around Meter means: to measure The word comes form Greek: Perimetron
When you measure the amount of wallpaper border to go around a room, you measure it in lengths. Would the perimeter of your bedroom or the perimeter of your house be greater? You’re right! The perimeter of your house is greater than the perimeter of your bedroom.
The distance around the outside of a shape is called the perimeter.
8 cm 6 cm 8 cm To find the perimeter: 1- Find the length of each side. 2- Add all the sides. The perimeter of the shape is = 28cm.
Homework: Find the perimeter of your room, lounge room, laundry and backyard. Find the perimeter of the following: (Your teacher will give a worksheet) Find the perimeter of your classroom
Is measured in square units Different for each shape Involves multiplication The backyard area The size of a surface Prior knowledge What is area?
The area of a shape is the amount of space inside it.
When you measure the amount of carpet to cover the floor of a room, you measure it in square units. Would the area of your bedroom or the area of your house be greater? You’re right! The area of your house is greater than the area of your bedroom.
The area of a square is equal to its side-length multiplied by its side-length. That is: Area of a square Consider a square that has a side-length of 4 cm. Using the method of counting squares, we find that the area of the square is 16 cm 2. Clearly, the square contains 4 rows of 4 squares. Therefore:
p/ks2/maths/perimeter_and_area/index.html online activity for Area and perimeter