Perimeter and Area

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Perimeter and Area

Area of Composite Shapes

Students learn how to find the area of composite shapes.  Learning progresses from counting the squares inside t...

Area of Triangles and Composite Shapes

Progressing on from finding the area of a triangle students calculate the area of composite shapes made up of tr...

Composite Area of 2D Shapes

Students learn how to find the composite area of 2D shapes involving triangles, rectangles, trapezia and paralle...

Finding the Area of a Rectangle

Students learn about finding the area of a rectangle.  They progress from counting the squares inside and multip...

Finding the Area of a Triangle

Students practice finding the area of a triangle.  As the lesson progresses students learn how to use the formul...

Perimeter of Complex Shapes

Students learn how to find the perimeter of complex shapes.  Learning progresses from counting the distance arou...

Surface Area of Cubes and Cuboids

Students learn how to find the surface area of cubes and cuboids using nets and 3D drawings.  As learning progre...

Area of Parallelograms and Trapezia

Students learn how to calculate the area of parallelograms and trapeziums by considering how a parallelogram can...

Perimeter of Shapes

Students learn how to measure the perimeter of 2D shapes. by counting and later by creating and using a formula....

Area of Irregular Shapes

Students learn how to find the area of irregular shapes by grouping.  As learning progresses they are challenged...

Area of Compound Shapes

Students learn how to calculate the area of compound rectilinear shapes by splitting the shapes up into two or m...

Circumference of Circles Problems

This lesson consolidates calculating the circumference of a circle and the perimeter of circular shapes.  Studen...

Circumference of Circles

Students are taken through the process of discovering the relationship between the radius, diameter and circumfe...

Area of Triangles

By considering a right angled triangle as half a rectangle the students are guided through deriving the formula ...

Area of Rectangles

Students learn how to find the area of a rectangle first by counting, then repeated addition, basic multiplicati...

Area of Circles Problems

The lesson is intended to consolidate applying the area of circle formula to solve complex problems.  To extend ...

Mr Mathematics Blog

Calculating the Volume of a Pyramid

When calculating the volume of a pyramid we can substitute the values of the length, width and perpendicular height into the formula V = 1/3 lwh.  In my experience this is often provided for the students with little explanation as to why a volume of a pyramid is exactly one third the volume of a […]

Solving 3D Problems using Trigonometry

When teaching solving 3D problems using trigonometry we begin the lesson with a recap of Pythagoras’ Theorem and the three trigonometric ratios.  We do this by matching the ratio and equations to the respective right-angled triangle.   Students are encouraged to work in pairs and to show the diagrams as part of the working out on […]

Rounding to a significant figure

When I teach rounding to a significant figure, I ask the class to discuss in pairs or small groups a definition for the word significant.  It is a word that all the students have heard before but not all are able to define. After 2 or 3 minutes of conversation I ask the students to […]