How can you accurately construct the inscribed circle of a right-angled triangle?
![Diagram shows blue circle inside a right-angled triangle, touching in 3 places](/thinking-about-geometry/perfect-fit/images/triangle-1.png)
Labelling the diagram can often help you to break down a problem and to see what’s going on.
- How could you use the version of the diagram shown below to help?
- What else can you label on this diagram?
![Triangle now has vertices A,B,C and three perpendiculars have been added that touch at the centre of the circle](/thinking-about-geometry/perfect-fit/images/triangle-2.png)