# Category: Shapes

### Compound Measures – Speed (Distance/Time)

Speed is probably the easiest of the 3 compound measures to understand (the other 2 compound measures are Density and Force). We all know about the speed of cars for. read more…

### Surface Area of Solid Shapes

A reference page showing the formulas of the surface area of some common basic and composite shapes, including: Rectangular Prism Triangular Prism Pyramid Cone Sphere Cylinder Composite shape – Cylinder. read more…

### 3D Shapes

Below are the most common 3D shapes you will come across and with 3D shapes, you need to be able to work out the volume of these shapes. In a. read more…

### Similar Shapes – Area & Volume

Calculating the area or volume of similar shapes relies on two very simple formulae you need to know. These are the ‘Area Scale Factor (Area SF)’ and the ‘Volume Scale. read more…

### Similar Shapes

Similarity in mathematics has a precise meaning, unlike its usage in everyday life. 2 shapes are said to be similar if they fulfill the following 2 conditions: The corresponding angles. read more…

### Congruent vs Similar Shapes

The question of whether 2 shapes are congruent or similar is often asked of students. In fact the answer to this question is very simple. We saw in an earlier. read more…

### Shapes – Areas

This is a quick reference for working out the Area of the following shapes: circle, triangle, rectangle, parallelogram, trapezium and rhombus.

### Shapes – Circle

This post looks at various elements of a circle including: radius, diameter, circumference, arc, chord, tangent, segment, sector and also how to work out the area of a segment and. read more…

### Shapes – Polygons

Polygons are 2D closed shapes having straight sides. Although the smallest number of sides a polygon can have is 3; we will look at a polygons having 5 sides and. read more…