Properties of symmetry: - Students may notice symmetry in the isosceles and equilateral triangles and non-symmetry in the scalene triangles Informal recognition of these properties may be helpful in ...

Each proof uses different geometric constructions and trigonometric ... Four of their proofs work for non-isosceles right ...

This means that this triangle is isosceles. An isosceles triangle has two sides that are congruent (equal) in length. Even if the measurements were not labelled, you would still know it is an ...