What is pi?

A visual explanation of Pi.

What square and cube numbers?

Find out what square and cube numbers are in this KS3 guide.

How to prove the area of a triangle is ½ × base × height

A simple, step-by-step, visual guide showing you how to prove the area of a triangle is ½ × base × height.

How to show the area of a circle is π × r²

A simple, visual, step-by-step guide on How to prove the area of a circle is π x r².

How to show the surface area of a sphere is 4πr²

A simple, visual, step-by-step guide showing you how to show the surface area of a sphere is 4πr².

How to prove a cone's surface area = π × r × slant length

A simple, step-by-step, visual guide showing you how to prove the surface area of a cone is π × radius × slant length.

How to prove a cylinder's surface area is (2πr × h) + 2πr²

A simple, step-by-step, visual guide showing you how to prove the surface area of a cylinder is (2πr × h) + 2πr².

How to prove the formula for the area of a trapezium

A simple, visual, step-by-step guide on how to prove that the area of a trapezium = sum of the parallel sides x height / 2.

How to prove the area of a parallelogram is base × height

A simple, step-by-step, visual guide showing you how to prove the area of a parallelogram is base × height.

How to show the circumference of a circle is π x diameter

A simple, visual, step-by-step guide on how to show the circumference of a circle is π x diameter

What is the volume of a cone, a sphere and a cylinder?

A visual explanation of the volume of a cone, a sphere and a cylinder.

How to prove the volume of a cuboid is base × height × depth

A simple, visual, step-by-step guide showing you how to prove the volume of a cuboid is base × height × depth.

How to prove the volume of a cone is ⅓ height × πr²

A simple, step-by-step, visual guide showing you how to prove the volume of a cone is ⅓ height × πr².

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