Key learning points

1. The first side can be drawn accurately with a ruler
2. A pair of compasses should be used to indicate potential positions for the other sides, by drawing arcs
3. Where the two remaining sides intersect is where the two sides should be drawn to
4. All triangles with the same measurements are congruent

Keywords

• Pair of compasses - A pair of compasses is a tool which can be used to draw circles and arcs. A pair of compasses is sometimes referred to just as a compass.

• Radius - The radius is any line segment that joins the centre of a circle to any point on its circumference.

• Congruent - If one shape can fit exactly on top of another using rotation, reflection or translation, then the shapes are congruent.

• Arc - An arc is part of a curve. An arc of a circle is part of the circle’s circumference.

Common misconception