The line of symmetry goes through the vertex that has the different angle and the midpoint of the opposite (different length) side. An isosceles triangle has rotational symmetry of order 1.

Learn about and revise angles, lines and multi-sided shapes and their properties with this BBC Bitesize GCSE Maths Eduqas study guide.

Einstein referred to her as the most important woman in the history of mathematics. Her theorem has been recognized as “one of the most important mathematical theorems ever proved in guiding … ...