1. Learning outcomes You must be able to… Find the equations of lines
Use constructions (compass work) to locate the centre of a triangle using different techniques.

2. Centroids
The barycentre is the point of intersection of all the medians of a triangle
The Median is defined to the straight line from a vertex to the midpoint of the opposite side.

3. Centres of a triangle
On a set of axes from 0 to 10 (both axes), plot three point (0, 2), (9, 5) and (5, 7). Draw straight lines to form a triangle.

4. Centres of a triangle Find the equations of the three straight lines.x x x

5. Blank slide

6. What needs to stick?
Numerator
Top number.
Number of identified parts
Denominator
Bottom number.
Parts of a whole