Image caption, All three sides of an equilateral triangle are the same length. The word equilateral means equal lines. Each angle is the same size. Each angle is 60°. Image caption, An ...

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 ...

and acute based on their sides and angles. The video also covers the concept of congruency, demonstrating how two triangles can be equal in area. It introduces the formula for calculating the area ...