1Why do you need exactly three measurements to construct a triangle, and why must at least one be a length?
2State the triangle inequality and use it to decide whether sides 5 cm, 6 cm and 12 cm are possible.
3Describe how to construct a triangle given two angles and the side between them.
4A student is told all three angles of a triangle are 50°, 60° and 70°. Can they construct it? Explain.
5Why is a triangle rigid when a quadrilateral is not, and where is this used?