A **rectilineal shape** is any shape where all of the sides are straight (we can also use the word **polygon** instead of shape here). You need to know the properties of certain rectilineal shapes, and especially 4-sided ones, which are called quadrilaterals.

Which quadrilaterals do you know the names of, and which of their properties do you know? What are the names of some rectilineal shapes with more than 4 sides? What does it mean if we say a shape is **regular**?

**Properties of Quadrilaterals**

**Examples with Teacher**

**Exercise**

Let’s use what we know about coordinates and angles to try to complete the below exercises about quadrilaterals (exercises 12 and 13 on pages 199 to 202 of the core textbook)

Here are the answers to the above exercises: