Equilateral Triangles - JSS1 Mathematics Lesson Note

Definition: A triangle with all three sides of equal length.

Source:(Cuemath.com)

Properties:

At least two sides are of equal length.

The angles opposite the equal sides are equal.

The altitude (perpendicular from a vertex to the opposite side) bisects the base if drawn from the vertex opposite the base.

Example: An isosceles triangle can be seen in the shape of a yield sign.