Recognising line ... isosceles triangle with angles of 90°, 45° and 45° is a right-angled triangle. This is the only combination of angles that is possible. All right-angled isosceles triangles ...

You may hear students say words like ‘paralyzed’ triangle for isosceles and equilateral triangles after noticing the restrictive movements of these triangles upon dragging. Properties of symmetry: - ...

Properties of symmetry: - Students may notice symmetry in the isosceles and equilateral triangles and non-symmetry in the scalene ... (typical responses: colour, thicker line segments, two are closer ...