This activity is about identifying the **midpoints **of a line on a coordinate grid.

The lines will be horizontal or vertical.

You will be given the endpoints of the line.

Remember** ****the x number**

**comes**

*before*the y*number*

**.**

**To find the midpoint**

- Find the length of the whole line.

- Halve this length.

- Move along this half-distance from either of the endpoints.

**Example**

Find the coordinates of M, the midpoint of AC shown on the grid below.

**Answer**

The line AC is 8 units long.

Count the squares to check.

A has an x-coordinate of -5.

B has an x-coordinate of +3.

From -5 up to +3 is 8 units.

The half-distance is 8 ÷ 2 = 4 units.

M is the midpoint on the line AC.

It is 4 units to the right of A and 4 units to the left of C.

The coordinates of M are **(-1, -3)**.

That wasn't too tricky, was it? Let's have a go at some questions now.