Chapter 7 Area and Volume

The area of composite shapes is the amount of space inside a shape composed of basic shapes put together. It is measured in square units ( 〖cm〗^2,m^2,〖mm〗^2,,m2, etc.). In this section, we learn about rectangles, parallelograms, triangles, area of triangle, area of parallelogram, compound, area of square, perimeter, using formula area of trapezium, perimeter of composite shapes, area of composite shapes, area and perimeter of trapezium.

Accuracy refers to how close a measured value is to the actual (true) value. The accuracy of a measurement depends on the instrument you measure it with. In this section, we learn about Accuracy, converting, units.

A prism is a 3D solid that has the same cross-section all through its length. In this section, we learn about volume conversion, volume of prism, Convert volume, Surface area of Prisms, Surface area of composite shapes.

The circumference of a circle is its perimeter. For any circle the circumference = π × diameter. In this section, we learn about circumference of a circle, area and volume of circle.

A semicircle is a plane figure that is formed by dividing a circle into exactly two parts, while a quarter circle is a quarter of a circle, formed by splitting a circle into 4 equal parts or a semicircle into 2 equal parts. In this section, we learn about area of a circle sector.

The volume of drink in a can, or the volume of water in a pipe, can be modelled as a cylinder. In this section, we learn about Cylinders, spheres, using formulae volume of cylindrical can, volume of cylinder, volume of sphere, surface area of sphere.

Pyramids are three-dimensional figures with a polygon shaped base and triangular lateral faces, while a cone is a pyramid with a circular base. In this section, we learn about Pyramids, cones, volume of a cone, surface area of cones, surface area of right cones, volume of pyramid.