1. copyright@Ed2netLearning,Inc1 PERIMETER GRADE 3

2. copyright@Ed2netLearning,Inc2 Hello, How are you doing? Today, we are going to start a new lesson on Perimeter.

3. copyright@Ed2netLearning,Inc3 Perimeter Perimeter is defined as the distance around an object or shape.

4. copyright@Ed2netLearning,Inc4 Rules to find the perimeter Rule 1:Measure the length of all sides of the shape. Rule 2:Add all the measured sides of the shape. The sum of all the sides gives the perimeter.

5. copyright@Ed2netLearning,Inc5 Example: Find the perimeter of the given rectangle. Perimeter of the given rectangle is = 11 + 5 + 11 + 5 = 32 cm 5 cm 11 cm

6. copyright@Ed2netLearning,Inc6 Perimeter of square Perimeter of the shape when all the sides of the shape are equal = 4 x length of side Example – Perimeter of square 4 cm Perimeter of square = 4 x side = 4 x 4 = 16 cm

7. copyright@Ed2netLearning,Inc7 Perimeter  Perimeter obeys Commutative property of addition.  Perimeter of the rectangle does not change if the lengths of the sides are added in a different order.

8. copyright@Ed2netLearning,Inc8 Find the perimeter of the hexagon given below. Answer- 18 cm 3 cm

9. copyright@Ed2netLearning,Inc9 Important Tips  Two different polygons can have the same perimeter.  Perimeter can be calculated only of the closed figure.

10. copyright@Ed2netLearning,Inc10 13 match sticks are used to make a hut on the paper. If each match stick is 3 cm long, what is the perimeter of the hut?

11. copyright@Ed2netLearning,Inc11 What is the perimeter of the given figure? a) 36 cm b) 22 cm c) 28 cm d) None of these 5 cm 2 cm

12. copyright@Ed2netLearning,Inc12 The perimeter of the figure given below is 152 cm. Find the missing side. 6 cm 40 cm 11 cm

13. copyright@Ed2netLearning,Inc13 If each side of pentagon is 8 cm, what is the perimeter of the pentagon?

14. copyright@Ed2netLearning,Inc14 The Perimeter of the small room is 140 feet. If the room is rectangular shape and it is 40 feet wide. Find the length of the room.

15. copyright@Ed2netLearning,Inc15 ASSESSMENT

16. copyright@Ed2netLearning,Inc16 1.What is the perimeter of the equilateral triangle with side of 8 cm?

17. copyright@Ed2netLearning,Inc17 2.How much ribbon is required to move it around the outer boundary of the figure given below? 6 cm 4 cm 3 cm

18. copyright@Ed2netLearning,Inc18 3.If each centimeter of the ribbon costs $0.05, how much does it cost for the ribbon? (problem #2)

19. copyright@Ed2netLearning,Inc19 4.If the Perimeter of the square garden is 64 cm. What is the side of the perimeter?

20. copyright@Ed2netLearning,Inc20 5.Lara’s garden is 13 ft long and 9 ft wide. She wants to put a fence around it. How much fencing will Lara need?

21. copyright@Ed2netLearning,Inc21 6.How can you find the perimeter of a rhombus if the length of one side of rhombus is p cm? a) 4 x p cm b) 4 + p cm c) 4 – p cm d) None of these

22. copyright@Ed2netLearning,Inc22 7.Find the perimeter of the figure given below (trapezium). 9 cm 12 cm 5 cm

23. copyright@Ed2netLearning,Inc23 8.A small square box drawn on graph paper is 4 units long on each side. How many little squares are inside the square?

24. copyright@Ed2netLearning,Inc24 9.Pope ran twice around the square park of side 7 m. How much distance did he cover?

25. copyright@Ed2netLearning,Inc25 10.Find the Perimeter of the given figure. 8 cm 6cm 4 cm 2 cm

26. copyright@Ed2netLearning,Inc26 Recap  Perimeter  Rules to find Perimeter  Commutative property of Addition  Important Tips  Solved Examples  Practice Problems

27. copyright@Ed2netLearning,Inc27 Well Done! Now Practice worksheets on the lesson.