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Created by Mr. Lafferty Maths Dept. Perimeter Perimeters Composite Perimeter www.mathsrevision.com 22-Feb-19 Created by Mr. Lafferty Maths Dept.

Created by Mr. Lafferty Maths Dept. Starter Questions www.mathsrevision.com 22-Feb-19 Created by Mr. Lafferty Maths Dept.

Created by Mr. Lafferty Maths Dept. Perimeter Learning Intention Success Criteria 1. We are learning the term perimeter of a shape. Understand the term perimeter of a shape. www.mathsrevision.com 2. Calculate the perimeter of a shape. 22-Feb-19 Created by Mr. Lafferty Maths Dept.

Created by Mr. Lafferty Maths Dept. Perimeter What is perimeter ? www.mathsrevision.com Hint answer is on the screen ! 22-Feb-19 Created by Mr. Lafferty Maths Dept.

Created by Mr. Lafferty Maths Dept. Perimeter www.mathsrevision.com Perimeter 22-Feb-19 Created by Mr. Lafferty Maths Dept.

Created by Mr. Lafferty Maths Dept. Perimeter www.mathsrevision.com Perimeter 22-Feb-19 Created by Mr. Lafferty Maths Dept.

Perimeter Perimeter is the distance round the outside of a 2D shape www.mathsrevision.com 22-Feb-19 Created by Mr. Lafferty Maths Dept.

Created by Mr. Lafferty Maths Dept. Perimeter 6cm Calculate the perimeter of the rectangle below. 3cm Demo www.mathsrevision.com Perimeter = 6 + 3 + 6 + 3 18cm = 22-Feb-19 Created by Mr. Lafferty Maths Dept.

Created by Mr. Lafferty Maths Dept. Perimeter If the perimeter of the shape is 38m. Calculate the missing length. 10m 7m 10 + 7 + 8 = 25m 8m ? www.mathsrevision.com 38 - 25 = 13m Demo 22-Feb-19 Created by Mr. Lafferty Maths Dept.

Created by Mr. Lafferty Maths Dept. Perimeter Calculate the missing length if the perimeter is 80cm. ? 28 + 28 = 56cm 80 - 56 = 24cm 28cm www.mathsrevision.com 24 ÷ 2 = 12cm Demo 22-Feb-19 Created by Mr. Lafferty Maths Dept.

Created by Mr. Lafferty Maths Dept. Perimeter Now Try TJ N4 Lifeskills Exercise 1 Ch14 (page 111) www.mathsrevision.com 22-Feb-19 Created by Mr. Lafferty Maths Dept.

Created by Mr. Lafferty Maths Dept. Starter Questions Q1. Why is Q2. What is the time difference 07:54 and 13:36 Q3. www.mathsrevision.com Q4. Convert 45.1 metres to (a) cm (b) mm Q5. The answer to the question is 90. What is the question. 22-Feb-19 Created by Mr. Lafferty Maths Dept.

Composite Perimeter Some desks are arranged in certain ways. Find the perimeter of each arrangement. Composite Perimeter Some desks are arranged in certain ways. Each desk is square shaped and has length 60cm www.mathsrevision.com 22-Feb-19 Created by Mr. Lafferty Maths Dept.

Created by Mr. Lafferty Maths Dept. Perimeter Problem Below is a drawing of the school building. Calculate the perimeter. 4 m 9 m 8 m x m 12 m x = 12 – 9 =3 m www.mathsrevision.com Perimeter = 12 + 8 + 3 + 4 + 9 + 4 = 40 m 22-Feb-19 Created by Mr. Lafferty Maths Dept.

Carpet grip comes in packets of five 1 metre lengths. How much will it cost to put carpet grip round this shape ? 4m Perimeter = 6 + 3 + 2 + 1.5 + 4 + 4.5 = 21m Number of 1 metre grips = 21 1.5m No of packs = 21 ÷ 5 = 4.2 packs 2m So we need 5 packs 4.5m Cost = 5 x £ 4.50 = £22.50 3m 6m

2 KU 3 KU

Created by Mr. Lafferty Maths Dept. Composite Perimeter Now Try TJ N4 Lifeskills Exercise 4 Ch14 (page 118) www.mathsrevision.com 22-Feb-19 Created by Mr. Lafferty Maths Dept.