Area Perimeter maths Net Cubes Compound Shapes Year 5

Work out the area an perimeter of cubes etc.

You can print out shapes and give to pupils.

Learning Objectives. Ma 1 Organising and explaining

Ma 3 Calculate perimeter/area of squares and rectangles.

· To explain methods and reasoning

· To solve mathematical problems, recognise and explain patterns and relationships.

· Calculate perimeters and areas of rectangles.

· Find the largest area that can be made with a rectangle that has a perimeter of 26 metres.

Success criteria.

· To be able to work out the area of a rectangle or square.

· To make different rectangles that all have the same perimeter.

· To recognise the largest area.

· To compare the relationship between the length of the sides and the area of the rectangle.

· To explain reasoning.

Model the way to answer the question referring to work of a few weeks ago on perimeters. How many different sized pig pens can be made using only 12 fencing panels?

Discuss how the children think they could solve this problem.

The Problem.

We want to make a school garden and grow vegetables. At night time the rabbits and deer will come and eat them. To stop them we need to put a fence around the area. However we can only afford to buy 26, one metre long panels.

Find the largest area we can fence off to make a rectangular vegetable patch?

• Remember it can only have a perimeter of 26 metres.

Vocabulary.

add

subtract

multiply

dividedouble

half

equals

rectangle

square

area

perimeter

cm2

Resources:-

multi-link. L/A

rulers.

Squared paper.

Home work:- if applicable.

Assessment. Children exceeding the objectives.