Save guides, add subjects and pick up where you left off with your BBC account. The circumference of a circle = \(\pi d\) or \(2\pi r\). Look at the sector of the circle shown below. To calculate ...

The Calvin University Math Circle is an opportunity for 6th–8th grade students (typically 11–13 years old) to engage with exciting problems and topics in mathematics. Meetings are led by a professor ...

Surface area is the sum of the area of each face. 3D shapes can be viewed from different points. Circles, sectors and arcs - Edexcel The circumference of a circle is its outside edge, and is the ...

There are books at every grade level that can engage students in thinking about math. Go on a shape hunt around the house or in your community. What shapes can your child find? Look for circles, ...