Students will begin to identify similar triangles, using the conditions of similarity and calculate missing lengths in pairs of similar triangles with this worksheet.

Section A consists of four sets of three triangles. Learners must identify the pair of similar triangles as well as stating the condition for similarity.

In section B, students are told that pairs of triangles are similar and they will calculate the missing lengths in both triangles ensuring they practise using the scale factor of enlargement to increase and decrease given lengths. This section gets increasingly difficult as learners will have to use the angles to identify corresponding lengths in the similar triangles.